key.c revision 1.81
1 /* $NetBSD: key.c,v 1.81 2013/06/05 19:01:26 christos Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.81 2013/06/05 19:01:26 christos Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 #include <sys/once.h> 67 #include <sys/cprng.h> 68 69 #include <net/if.h> 70 #include <net/route.h> 71 #include <net/raw_cb.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipsec_osdep.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 percpu_t *pfkeystat_percpu; 117 118 /* 119 * Note on SA reference counting: 120 * - SAs that are not in DEAD state will have (total external reference + 1) 121 * following value in reference count field. they cannot be freed and are 122 * referenced from SA header. 123 * - SAs that are in DEAD state will have (total external reference) 124 * in reference count field. they are ready to be freed. reference from 125 * SA header will be removed in key_delsav(), when the reference count 126 * field hits 0 (= no external reference other than from SA header. 127 */ 128 129 u_int32_t key_debug_level = 0; 130 static u_int key_spi_trycnt = 1000; 131 static u_int32_t key_spi_minval = 0x100; 132 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 133 static u_int32_t policy_id = 0; 134 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 135 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 136 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 137 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 138 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 139 140 static u_int32_t acq_seq = 0; 141 142 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 143 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 144 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 145 /* registed list */ 146 #ifndef IPSEC_NONBLOCK_ACQUIRE 147 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 148 #endif 149 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 150 151 /* search order for SAs */ 152 /* 153 * This order is important because we must select the oldest SA 154 * for outbound processing. For inbound, This is not important. 155 */ 156 static const u_int saorder_state_valid_prefer_old[] = { 157 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 158 }; 159 static const u_int saorder_state_valid_prefer_new[] = { 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 161 }; 162 163 static const u_int saorder_state_alive[] = { 164 /* except DEAD */ 165 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 166 }; 167 static const u_int saorder_state_any[] = { 168 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 169 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 170 }; 171 172 static const int minsize[] = { 173 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 174 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 175 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 176 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 178 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 179 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 181 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 182 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 183 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 184 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 185 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 186 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 187 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 188 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 189 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 190 0, /* SADB_X_EXT_KMPRIVATE */ 191 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 192 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 193 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 194 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 195 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 196 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 197 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 198 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 199 }; 200 static const int maxsize[] = { 201 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 202 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 204 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 205 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 206 0, /* SADB_EXT_ADDRESS_SRC */ 207 0, /* SADB_EXT_ADDRESS_DST */ 208 0, /* SADB_EXT_ADDRESS_PROXY */ 209 0, /* SADB_EXT_KEY_AUTH */ 210 0, /* SADB_EXT_KEY_ENCRYPT */ 211 0, /* SADB_EXT_IDENTITY_SRC */ 212 0, /* SADB_EXT_IDENTITY_DST */ 213 0, /* SADB_EXT_SENSITIVITY */ 214 0, /* SADB_EXT_PROPOSAL */ 215 0, /* SADB_EXT_SUPPORTED_AUTH */ 216 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 217 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 218 0, /* SADB_X_EXT_KMPRIVATE */ 219 0, /* SADB_X_EXT_POLICY */ 220 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 221 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 222 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 223 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 224 0, /* SADB_X_EXT_NAT_T_OAI */ 225 0, /* SADB_X_EXT_NAT_T_OAR */ 226 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 227 }; 228 229 static int ipsec_esp_keymin = 256; 230 static int ipsec_esp_auth = 0; 231 static int ipsec_ah_keymin = 128; 232 233 #ifdef SYSCTL_DECL 234 SYSCTL_DECL(_net_key); 235 #endif 236 237 #ifdef SYSCTL_INT 238 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 239 &key_debug_level, 0, ""); 240 241 /* max count of trial for the decision of spi value */ 242 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 243 &key_spi_trycnt, 0, ""); 244 245 /* minimum spi value to allocate automatically. */ 246 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 247 &key_spi_minval, 0, ""); 248 249 /* maximun spi value to allocate automatically. */ 250 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 251 &key_spi_maxval, 0, ""); 252 253 /* interval to initialize randseed */ 254 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 255 &key_int_random, 0, ""); 256 257 /* lifetime for larval SA */ 258 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 259 &key_larval_lifetime, 0, ""); 260 261 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 262 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 263 &key_blockacq_count, 0, ""); 264 265 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 266 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 267 &key_blockacq_lifetime, 0, ""); 268 269 /* ESP auth */ 270 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 271 &ipsec_esp_auth, 0, ""); 272 273 /* minimum ESP key length */ 274 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 275 &ipsec_esp_keymin, 0, ""); 276 277 /* minimum AH key length */ 278 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 279 &ipsec_ah_keymin, 0, ""); 280 281 /* perfered old SA rather than new SA */ 282 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 283 &key_prefered_oldsa, 0, ""); 284 #endif /* SYSCTL_INT */ 285 286 #ifndef LIST_FOREACH 287 #define LIST_FOREACH(elm, head, field) \ 288 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 289 #endif 290 #define __LIST_CHAINED(elm) \ 291 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 292 #define LIST_INSERT_TAIL(head, elm, type, field) \ 293 do {\ 294 struct type *curelm = LIST_FIRST(head); \ 295 if (curelm == NULL) {\ 296 LIST_INSERT_HEAD(head, elm, field); \ 297 } else { \ 298 while (LIST_NEXT(curelm, field)) \ 299 curelm = LIST_NEXT(curelm, field);\ 300 LIST_INSERT_AFTER(curelm, elm, field);\ 301 }\ 302 } while (0) 303 304 #define KEY_CHKSASTATE(head, sav, name) \ 305 /* do */ { \ 306 if ((head) != (sav)) { \ 307 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 308 (name), (head), (sav))); \ 309 continue; \ 310 } \ 311 } /* while (0) */ 312 313 #define KEY_CHKSPDIR(head, sp, name) \ 314 do { \ 315 if ((head) != (sp)) { \ 316 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 317 "anyway continue.\n", \ 318 (name), (head), (sp))); \ 319 } \ 320 } while (0) 321 322 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 323 324 #if 1 325 #define KMALLOC(p, t, n) \ 326 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 327 #define KFREE(p) \ 328 free((p), M_SECA) 329 #else 330 #define KMALLOC(p, t, n) \ 331 do { \ 332 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 333 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 334 __FILE__, __LINE__, (p), #t, n); \ 335 } while (0) 336 337 #define KFREE(p) \ 338 do { \ 339 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 340 free((p), M_SECA); \ 341 } while (0) 342 #endif 343 344 /* 345 * set parameters into secpolicyindex buffer. 346 * Must allocate secpolicyindex buffer passed to this function. 347 */ 348 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 349 do { \ 350 memset((idx), 0, sizeof(struct secpolicyindex)); \ 351 (idx)->dir = (_dir); \ 352 (idx)->prefs = (ps); \ 353 (idx)->prefd = (pd); \ 354 (idx)->ul_proto = (ulp); \ 355 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 356 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 357 } while (0) 358 359 /* 360 * set parameters into secasindex buffer. 361 * Must allocate secasindex buffer before calling this function. 362 */ 363 static int 364 key_setsecasidx (int, int, int, const struct sadb_address *, 365 const struct sadb_address *, struct secasindex *); 366 367 /* key statistics */ 368 struct _keystat { 369 u_long getspi_count; /* the avarage of count to try to get new SPI */ 370 } keystat; 371 372 struct sadb_msghdr { 373 struct sadb_msg *msg; 374 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 375 int extoff[SADB_EXT_MAX + 1]; 376 int extlen[SADB_EXT_MAX + 1]; 377 }; 378 379 static struct secasvar *key_allocsa_policy (const struct secasindex *); 380 static void key_freesp_so (struct secpolicy **); 381 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 382 static void key_delsp (struct secpolicy *); 383 static struct secpolicy *key_getsp (const struct secpolicyindex *); 384 static struct secpolicy *key_getspbyid (u_int32_t); 385 static u_int16_t key_newreqid (void); 386 static struct mbuf *key_gather_mbuf (struct mbuf *, 387 const struct sadb_msghdr *, int, int, ...); 388 static int key_spdadd (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static u_int32_t key_getnewspid (void); 391 static int key_spddelete (struct socket *, struct mbuf *, 392 const struct sadb_msghdr *); 393 static int key_spddelete2 (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spdget (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spdflush (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spddump (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static struct mbuf * key_setspddump (int *errorp, pid_t); 402 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 403 static int key_nat_map (struct socket *, struct mbuf *, 404 const struct sadb_msghdr *); 405 static struct mbuf *key_setdumpsp (struct secpolicy *, 406 u_int8_t, u_int32_t, pid_t); 407 static u_int key_getspreqmsglen (const struct secpolicy *); 408 static int key_spdexpire (struct secpolicy *); 409 static struct secashead *key_newsah (const struct secasindex *); 410 static void key_delsah (struct secashead *); 411 static struct secasvar *key_newsav (struct mbuf *, 412 const struct sadb_msghdr *, struct secashead *, int *, 413 const char*, int); 414 #define KEY_NEWSAV(m, sadb, sah, e) \ 415 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 416 static void key_delsav (struct secasvar *); 417 static struct secashead *key_getsah (const struct secasindex *); 418 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 419 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 420 static int key_setsaval (struct secasvar *, struct mbuf *, 421 const struct sadb_msghdr *); 422 static int key_mature (struct secasvar *); 423 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 424 u_int8_t, u_int32_t, u_int32_t); 425 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 426 static struct mbuf *key_setsadbxtype (u_int16_t); 427 static struct mbuf *key_setsadbxfrag (u_int16_t); 428 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 429 static int key_checksalen (const union sockaddr_union *); 430 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 431 u_int32_t, pid_t, u_int16_t); 432 static struct mbuf *key_setsadbsa (struct secasvar *); 433 static struct mbuf *key_setsadbaddr (u_int16_t, 434 const struct sockaddr *, u_int8_t, u_int16_t); 435 #if 0 436 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 437 int, u_int64_t); 438 #endif 439 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 440 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 441 u_int32_t); 442 static void *key_newbuf (const void *, u_int); 443 #ifdef INET6 444 static int key_ismyaddr6 (const struct sockaddr_in6 *); 445 #endif 446 447 /* flags for key_cmpsaidx() */ 448 #define CMP_HEAD 1 /* protocol, addresses. */ 449 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 450 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 451 #define CMP_EXACTLY 4 /* all elements. */ 452 static int key_cmpsaidx 453 (const struct secasindex *, const struct secasindex *, int); 454 455 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 456 static int key_bbcmp (const void *, const void *, u_int); 457 static u_int16_t key_satype2proto (u_int8_t); 458 static u_int8_t key_proto2satype (u_int16_t); 459 460 static int key_getspi (struct socket *, struct mbuf *, 461 const struct sadb_msghdr *); 462 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 463 const struct secasindex *); 464 static int key_handle_natt_info (struct secasvar *, 465 const struct sadb_msghdr *); 466 static int key_set_natt_ports (union sockaddr_union *, 467 union sockaddr_union *, 468 const struct sadb_msghdr *); 469 static int key_update (struct socket *, struct mbuf *, 470 const struct sadb_msghdr *); 471 #ifdef IPSEC_DOSEQCHECK 472 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 473 #endif 474 static int key_add (struct socket *, struct mbuf *, 475 const struct sadb_msghdr *); 476 static int key_setident (struct secashead *, struct mbuf *, 477 const struct sadb_msghdr *); 478 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 479 const struct sadb_msghdr *); 480 static int key_delete (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_get (struct socket *, struct mbuf *, 483 const struct sadb_msghdr *); 484 485 static void key_getcomb_setlifetime (struct sadb_comb *); 486 static struct mbuf *key_getcomb_esp (void); 487 static struct mbuf *key_getcomb_ah (void); 488 static struct mbuf *key_getcomb_ipcomp (void); 489 static struct mbuf *key_getprop (const struct secasindex *); 490 491 static int key_acquire (const struct secasindex *, struct secpolicy *); 492 #ifndef IPSEC_NONBLOCK_ACQUIRE 493 static struct secacq *key_newacq (const struct secasindex *); 494 static struct secacq *key_getacq (const struct secasindex *); 495 static struct secacq *key_getacqbyseq (u_int32_t); 496 #endif 497 static struct secspacq *key_newspacq (const struct secpolicyindex *); 498 static struct secspacq *key_getspacq (const struct secpolicyindex *); 499 static int key_acquire2 (struct socket *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static int key_register (struct socket *, struct mbuf *, 502 const struct sadb_msghdr *); 503 static int key_expire (struct secasvar *); 504 static int key_flush (struct socket *, struct mbuf *, 505 const struct sadb_msghdr *); 506 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 507 int *lenp, pid_t pid); 508 static int key_dump (struct socket *, struct mbuf *, 509 const struct sadb_msghdr *); 510 static int key_promisc (struct socket *, struct mbuf *, 511 const struct sadb_msghdr *); 512 static int key_senderror (struct socket *, struct mbuf *, int); 513 static int key_validate_ext (const struct sadb_ext *, int); 514 static int key_align (struct mbuf *, struct sadb_msghdr *); 515 #if 0 516 static const char *key_getfqdn (void); 517 static const char *key_getuserfqdn (void); 518 #endif 519 static void key_sa_chgstate (struct secasvar *, u_int8_t); 520 static inline void key_sp_dead (struct secpolicy *); 521 static void key_sp_unlink (struct secpolicy *sp); 522 523 static struct mbuf *key_alloc_mbuf (int); 524 struct callout key_timehandler_ch; 525 526 #define SA_ADDREF(p) do { \ 527 (p)->refcnt++; \ 528 IPSEC_ASSERT((p)->refcnt != 0, \ 529 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 530 } while (0) 531 #define SA_DELREF(p) do { \ 532 IPSEC_ASSERT((p)->refcnt > 0, \ 533 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 534 (p)->refcnt--; \ 535 } while (0) 536 537 #define SP_ADDREF(p) do { \ 538 (p)->refcnt++; \ 539 IPSEC_ASSERT((p)->refcnt != 0, \ 540 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 541 } while (0) 542 #define SP_DELREF(p) do { \ 543 IPSEC_ASSERT((p)->refcnt > 0, \ 544 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 545 (p)->refcnt--; \ 546 } while (0) 547 548 549 static inline void 550 key_sp_dead(struct secpolicy *sp) 551 { 552 553 /* mark the SP dead */ 554 sp->state = IPSEC_SPSTATE_DEAD; 555 } 556 557 static void 558 key_sp_unlink(struct secpolicy *sp) 559 { 560 561 /* remove from SP index */ 562 if (__LIST_CHAINED(sp)) { 563 LIST_REMOVE(sp, chain); 564 /* Release refcount held just for being on chain */ 565 KEY_FREESP(&sp); 566 } 567 } 568 569 570 /* 571 * Return 0 when there are known to be no SP's for the specified 572 * direction. Otherwise return 1. This is used by IPsec code 573 * to optimize performance. 574 */ 575 int 576 key_havesp(u_int dir) 577 { 578 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 579 LIST_FIRST(&sptree[dir]) != NULL : 1); 580 } 581 582 /* %%% IPsec policy management */ 583 /* 584 * allocating a SP for OUTBOUND or INBOUND packet. 585 * Must call key_freesp() later. 586 * OUT: NULL: not found 587 * others: found and return the pointer. 588 */ 589 struct secpolicy * 590 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 591 { 592 struct secpolicy *sp; 593 int s; 594 595 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 596 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 597 ("key_allocsp: invalid direction %u", dir)); 598 599 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 600 printf("DP key_allocsp from %s:%u\n", where, tag)); 601 602 /* get a SP entry */ 603 s = splsoftnet(); /*called from softclock()*/ 604 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 605 printf("*** objects\n"); 606 kdebug_secpolicyindex(spidx)); 607 608 LIST_FOREACH(sp, &sptree[dir], chain) { 609 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 610 printf("*** in SPD\n"); 611 kdebug_secpolicyindex(&sp->spidx)); 612 613 if (sp->state == IPSEC_SPSTATE_DEAD) 614 continue; 615 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 616 goto found; 617 } 618 sp = NULL; 619 found: 620 if (sp) { 621 /* sanity check */ 622 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 623 624 /* found a SPD entry */ 625 sp->lastused = time_uptime; 626 SP_ADDREF(sp); 627 } 628 splx(s); 629 630 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 631 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 632 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 633 return sp; 634 } 635 636 /* 637 * allocating a SP for OUTBOUND or INBOUND packet. 638 * Must call key_freesp() later. 639 * OUT: NULL: not found 640 * others: found and return the pointer. 641 */ 642 struct secpolicy * 643 key_allocsp2(u_int32_t spi, 644 const union sockaddr_union *dst, 645 u_int8_t proto, 646 u_int dir, 647 const char* where, int tag) 648 { 649 struct secpolicy *sp; 650 int s; 651 652 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 653 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 654 ("key_allocsp2: invalid direction %u", dir)); 655 656 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 657 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 658 659 /* get a SP entry */ 660 s = splsoftnet(); /*called from softclock()*/ 661 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 662 printf("*** objects\n"); 663 printf("spi %u proto %u dir %u\n", spi, proto, dir); 664 kdebug_sockaddr(&dst->sa)); 665 666 LIST_FOREACH(sp, &sptree[dir], chain) { 667 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 668 printf("*** in SPD\n"); 669 kdebug_secpolicyindex(&sp->spidx)); 670 671 if (sp->state == IPSEC_SPSTATE_DEAD) 672 continue; 673 /* compare simple values, then dst address */ 674 if (sp->spidx.ul_proto != proto) 675 continue; 676 /* NB: spi's must exist and match */ 677 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 678 continue; 679 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 680 goto found; 681 } 682 sp = NULL; 683 found: 684 if (sp) { 685 /* sanity check */ 686 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 687 688 /* found a SPD entry */ 689 sp->lastused = time_uptime; 690 SP_ADDREF(sp); 691 } 692 splx(s); 693 694 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 695 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 696 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 697 return sp; 698 } 699 700 /* 701 * return a policy that matches this particular inbound packet. 702 * XXX slow 703 */ 704 struct secpolicy * 705 key_gettunnel(const struct sockaddr *osrc, 706 const struct sockaddr *odst, 707 const struct sockaddr *isrc, 708 const struct sockaddr *idst, 709 const char* where, int tag) 710 { 711 struct secpolicy *sp; 712 const int dir = IPSEC_DIR_INBOUND; 713 int s; 714 struct ipsecrequest *r1, *r2, *p; 715 struct secpolicyindex spidx; 716 717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718 printf("DP key_gettunnel from %s:%u\n", where, tag)); 719 720 if (isrc->sa_family != idst->sa_family) { 721 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 722 isrc->sa_family, idst->sa_family)); 723 sp = NULL; 724 goto done; 725 } 726 727 s = splsoftnet(); /*called from softclock()*/ 728 LIST_FOREACH(sp, &sptree[dir], chain) { 729 if (sp->state == IPSEC_SPSTATE_DEAD) 730 continue; 731 732 r1 = r2 = NULL; 733 for (p = sp->req; p; p = p->next) { 734 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 735 continue; 736 737 r1 = r2; 738 r2 = p; 739 740 if (!r1) { 741 /* here we look at address matches only */ 742 spidx = sp->spidx; 743 if (isrc->sa_len > sizeof(spidx.src) || 744 idst->sa_len > sizeof(spidx.dst)) 745 continue; 746 memcpy(&spidx.src, isrc, isrc->sa_len); 747 memcpy(&spidx.dst, idst, idst->sa_len); 748 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 749 continue; 750 } else { 751 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 752 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 753 continue; 754 } 755 756 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 757 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 758 continue; 759 760 goto found; 761 } 762 } 763 sp = NULL; 764 found: 765 if (sp) { 766 sp->lastused = time_uptime; 767 SP_ADDREF(sp); 768 } 769 splx(s); 770 done: 771 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 772 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 773 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 774 return sp; 775 } 776 777 /* 778 * allocating an SA entry for an *OUTBOUND* packet. 779 * checking each request entries in SP, and acquire an SA if need. 780 * OUT: 0: there are valid requests. 781 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 782 */ 783 int 784 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 785 { 786 u_int level; 787 int error; 788 789 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 790 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 791 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 792 saidx->mode == IPSEC_MODE_TUNNEL, 793 ("key_checkrequest: unexpected policy %u", saidx->mode)); 794 795 /* get current level */ 796 level = ipsec_get_reqlevel(isr); 797 798 /* 799 * XXX guard against protocol callbacks from the crypto 800 * thread as they reference ipsecrequest.sav which we 801 * temporarily null out below. Need to rethink how we 802 * handle bundled SA's in the callback thread. 803 */ 804 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 805 #if 0 806 /* 807 * We do allocate new SA only if the state of SA in the holder is 808 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 809 */ 810 if (isr->sav != NULL) { 811 if (isr->sav->sah == NULL) 812 panic("key_checkrequest: sah is null"); 813 if (isr->sav == (struct secasvar *)LIST_FIRST( 814 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 815 KEY_FREESAV(&isr->sav); 816 isr->sav = NULL; 817 } 818 } 819 #else 820 /* 821 * we free any SA stashed in the IPsec request because a different 822 * SA may be involved each time this request is checked, either 823 * because new SAs are being configured, or this request is 824 * associated with an unconnected datagram socket, or this request 825 * is associated with a system default policy. 826 * 827 * The operation may have negative impact to performance. We may 828 * want to check cached SA carefully, rather than picking new SA 829 * every time. 830 */ 831 if (isr->sav != NULL) { 832 KEY_FREESAV(&isr->sav); 833 isr->sav = NULL; 834 } 835 #endif 836 837 /* 838 * new SA allocation if no SA found. 839 * key_allocsa_policy should allocate the oldest SA available. 840 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 841 */ 842 if (isr->sav == NULL) 843 isr->sav = key_allocsa_policy(saidx); 844 845 /* When there is SA. */ 846 if (isr->sav != NULL) { 847 if (isr->sav->state != SADB_SASTATE_MATURE && 848 isr->sav->state != SADB_SASTATE_DYING) 849 return EINVAL; 850 return 0; 851 } 852 853 /* there is no SA */ 854 error = key_acquire(saidx, isr->sp); 855 if (error != 0) { 856 /* XXX What should I do ? */ 857 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 858 "from key_acquire.\n", error)); 859 return error; 860 } 861 862 if (level != IPSEC_LEVEL_REQUIRE) { 863 /* XXX sigh, the interface to this routine is botched */ 864 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 865 return 0; 866 } else { 867 return ENOENT; 868 } 869 } 870 871 /* 872 * allocating a SA for policy entry from SAD. 873 * NOTE: searching SAD of aliving state. 874 * OUT: NULL: not found. 875 * others: found and return the pointer. 876 */ 877 static struct secasvar * 878 key_allocsa_policy(const struct secasindex *saidx) 879 { 880 struct secashead *sah; 881 struct secasvar *sav; 882 u_int stateidx, state; 883 const u_int *saorder_state_valid; 884 int arraysize; 885 886 LIST_FOREACH(sah, &sahtree, chain) { 887 if (sah->state == SADB_SASTATE_DEAD) 888 continue; 889 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 890 goto found; 891 } 892 893 return NULL; 894 895 found: 896 897 /* 898 * search a valid state list for outbound packet. 899 * This search order is important. 900 */ 901 if (key_prefered_oldsa) { 902 saorder_state_valid = saorder_state_valid_prefer_old; 903 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 904 } else { 905 saorder_state_valid = saorder_state_valid_prefer_new; 906 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 907 } 908 909 /* search valid state */ 910 for (stateidx = 0; 911 stateidx < arraysize; 912 stateidx++) { 913 914 state = saorder_state_valid[stateidx]; 915 916 sav = key_do_allocsa_policy(sah, state); 917 if (sav != NULL) 918 return sav; 919 } 920 921 return NULL; 922 } 923 924 /* 925 * searching SAD with direction, protocol, mode and state. 926 * called by key_allocsa_policy(). 927 * OUT: 928 * NULL : not found 929 * others : found, pointer to a SA. 930 */ 931 static struct secasvar * 932 key_do_allocsa_policy(struct secashead *sah, u_int state) 933 { 934 struct secasvar *sav, *nextsav, *candidate, *d; 935 936 /* initilize */ 937 candidate = NULL; 938 939 for (sav = LIST_FIRST(&sah->savtree[state]); 940 sav != NULL; 941 sav = nextsav) { 942 943 nextsav = LIST_NEXT(sav, chain); 944 945 /* sanity check */ 946 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 947 948 /* initialize */ 949 if (candidate == NULL) { 950 candidate = sav; 951 continue; 952 } 953 954 /* Which SA is the better ? */ 955 956 /* sanity check 2 */ 957 if (candidate->lft_c == NULL || sav->lft_c == NULL) 958 panic("key_do_allocsa_policy: " 959 "lifetime_current is NULL"); 960 961 /* What the best method is to compare ? */ 962 if (key_prefered_oldsa) { 963 if (candidate->lft_c->sadb_lifetime_addtime > 964 sav->lft_c->sadb_lifetime_addtime) { 965 candidate = sav; 966 } 967 continue; 968 /*NOTREACHED*/ 969 } 970 971 /* prefered new sa rather than old sa */ 972 if (candidate->lft_c->sadb_lifetime_addtime < 973 sav->lft_c->sadb_lifetime_addtime) { 974 d = candidate; 975 candidate = sav; 976 } else 977 d = sav; 978 979 /* 980 * prepared to delete the SA when there is more 981 * suitable candidate and the lifetime of the SA is not 982 * permanent. 983 */ 984 if (d->lft_c->sadb_lifetime_addtime != 0) { 985 struct mbuf *m, *result = 0; 986 uint8_t satype; 987 988 key_sa_chgstate(d, SADB_SASTATE_DEAD); 989 990 IPSEC_ASSERT(d->refcnt > 0, 991 ("key_do_allocsa_policy: bogus ref count")); 992 993 satype = key_proto2satype(d->sah->saidx.proto); 994 if (satype == 0) 995 goto msgfail; 996 997 m = key_setsadbmsg(SADB_DELETE, 0, 998 satype, 0, 0, d->refcnt - 1); 999 if (!m) 1000 goto msgfail; 1001 result = m; 1002 1003 /* set sadb_address for saidx's. */ 1004 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1005 &d->sah->saidx.src.sa, 1006 d->sah->saidx.src.sa.sa_len << 3, 1007 IPSEC_ULPROTO_ANY); 1008 if (!m) 1009 goto msgfail; 1010 m_cat(result, m); 1011 1012 /* set sadb_address for saidx's. */ 1013 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1014 &d->sah->saidx.src.sa, 1015 d->sah->saidx.src.sa.sa_len << 3, 1016 IPSEC_ULPROTO_ANY); 1017 if (!m) 1018 goto msgfail; 1019 m_cat(result, m); 1020 1021 /* create SA extension */ 1022 m = key_setsadbsa(d); 1023 if (!m) 1024 goto msgfail; 1025 m_cat(result, m); 1026 1027 if (result->m_len < sizeof(struct sadb_msg)) { 1028 result = m_pullup(result, 1029 sizeof(struct sadb_msg)); 1030 if (result == NULL) 1031 goto msgfail; 1032 } 1033 1034 result->m_pkthdr.len = 0; 1035 for (m = result; m; m = m->m_next) 1036 result->m_pkthdr.len += m->m_len; 1037 mtod(result, struct sadb_msg *)->sadb_msg_len = 1038 PFKEY_UNIT64(result->m_pkthdr.len); 1039 1040 key_sendup_mbuf(NULL, result, 1041 KEY_SENDUP_REGISTERED); 1042 result = 0; 1043 msgfail: 1044 if (result) 1045 m_freem(result); 1046 KEY_FREESAV(&d); 1047 } 1048 } 1049 1050 if (candidate) { 1051 SA_ADDREF(candidate); 1052 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1053 printf("DP allocsa_policy cause " 1054 "refcnt++:%d SA:%p\n", 1055 candidate->refcnt, candidate)); 1056 } 1057 return candidate; 1058 } 1059 1060 /* 1061 * allocating a usable SA entry for a *INBOUND* packet. 1062 * Must call key_freesav() later. 1063 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1064 * NULL: not found, or error occurred. 1065 * 1066 * In the comparison, no source address is used--for RFC2401 conformance. 1067 * To quote, from section 4.1: 1068 * A security association is uniquely identified by a triple consisting 1069 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1070 * security protocol (AH or ESP) identifier. 1071 * Note that, however, we do need to keep source address in IPsec SA. 1072 * IKE specification and PF_KEY specification do assume that we 1073 * keep source address in IPsec SA. We see a tricky situation here. 1074 * 1075 * sport and dport are used for NAT-T. network order is always used. 1076 */ 1077 struct secasvar * 1078 key_allocsa( 1079 const union sockaddr_union *dst, 1080 u_int proto, 1081 u_int32_t spi, 1082 u_int16_t sport, 1083 u_int16_t dport, 1084 const char* where, int tag) 1085 { 1086 struct secashead *sah; 1087 struct secasvar *sav; 1088 u_int stateidx, state; 1089 const u_int *saorder_state_valid; 1090 int arraysize; 1091 int s; 1092 int chkport = 0; 1093 1094 int must_check_spi = 1; 1095 int must_check_alg = 0; 1096 u_int16_t cpi = 0; 1097 u_int8_t algo = 0; 1098 1099 if ((sport != 0) && (dport != 0)) 1100 chkport = 1; 1101 1102 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1103 1104 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1105 printf("DP key_allocsa from %s:%u\n", where, tag)); 1106 1107 /* 1108 * XXX IPCOMP case 1109 * We use cpi to define spi here. In the case where cpi <= 1110 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1111 * the real spi. In this case, don't check the spi but check the 1112 * algorithm 1113 */ 1114 1115 if (proto == IPPROTO_IPCOMP) { 1116 u_int32_t tmp; 1117 tmp = ntohl(spi); 1118 cpi = (u_int16_t) tmp; 1119 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1120 algo = (u_int8_t) cpi; 1121 must_check_spi = 0; 1122 must_check_alg = 1; 1123 } 1124 } 1125 1126 /* 1127 * searching SAD. 1128 * XXX: to be checked internal IP header somewhere. Also when 1129 * IPsec tunnel packet is received. But ESP tunnel mode is 1130 * encrypted so we can't check internal IP header. 1131 */ 1132 s = splsoftnet(); /*called from softclock()*/ 1133 if (key_prefered_oldsa) { 1134 saorder_state_valid = saorder_state_valid_prefer_old; 1135 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1136 } else { 1137 saorder_state_valid = saorder_state_valid_prefer_new; 1138 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1139 } 1140 LIST_FOREACH(sah, &sahtree, chain) { 1141 /* search valid state */ 1142 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1143 state = saorder_state_valid[stateidx]; 1144 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1145 /* sanity check */ 1146 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1147 /* do not return entries w/ unusable state */ 1148 if (sav->state != SADB_SASTATE_MATURE && 1149 sav->state != SADB_SASTATE_DYING) 1150 continue; 1151 if (proto != sav->sah->saidx.proto) 1152 continue; 1153 if (must_check_spi && spi != sav->spi) 1154 continue; 1155 /* XXX only on the ipcomp case */ 1156 if (must_check_alg && algo != sav->alg_comp) 1157 continue; 1158 1159 #if 0 /* don't check src */ 1160 /* Fix port in src->sa */ 1161 1162 /* check src address */ 1163 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1164 continue; 1165 #endif 1166 /* fix port of dst address XXX*/ 1167 key_porttosaddr(__UNCONST(dst), dport); 1168 /* check dst address */ 1169 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1170 continue; 1171 SA_ADDREF(sav); 1172 goto done; 1173 } 1174 } 1175 } 1176 sav = NULL; 1177 done: 1178 splx(s); 1179 1180 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1181 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1182 sav, sav ? sav->refcnt : 0)); 1183 return sav; 1184 } 1185 1186 /* 1187 * Must be called after calling key_allocsp(). 1188 * For both the packet without socket and key_freeso(). 1189 */ 1190 void 1191 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1192 { 1193 struct secpolicy *sp = *spp; 1194 1195 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1196 1197 SP_DELREF(sp); 1198 1199 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1200 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1201 sp, sp->id, where, tag, sp->refcnt)); 1202 1203 if (sp->refcnt == 0) { 1204 *spp = NULL; 1205 key_delsp(sp); 1206 } 1207 } 1208 1209 /* 1210 * Must be called after calling key_allocsp(). 1211 * For the packet with socket. 1212 */ 1213 void 1214 key_freeso(struct socket *so) 1215 { 1216 /* sanity check */ 1217 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1218 1219 switch (so->so_proto->pr_domain->dom_family) { 1220 #ifdef INET 1221 case PF_INET: 1222 { 1223 struct inpcb *pcb = sotoinpcb(so); 1224 1225 /* Does it have a PCB ? */ 1226 if (pcb == NULL) 1227 return; 1228 key_freesp_so(&pcb->inp_sp->sp_in); 1229 key_freesp_so(&pcb->inp_sp->sp_out); 1230 } 1231 break; 1232 #endif 1233 #ifdef INET6 1234 case PF_INET6: 1235 { 1236 #ifdef HAVE_NRL_INPCB 1237 struct inpcb *pcb = sotoinpcb(so); 1238 1239 /* Does it have a PCB ? */ 1240 if (pcb == NULL) 1241 return; 1242 key_freesp_so(&pcb->inp_sp->sp_in); 1243 key_freesp_so(&pcb->inp_sp->sp_out); 1244 #else 1245 struct in6pcb *pcb = sotoin6pcb(so); 1246 1247 /* Does it have a PCB ? */ 1248 if (pcb == NULL) 1249 return; 1250 key_freesp_so(&pcb->in6p_sp->sp_in); 1251 key_freesp_so(&pcb->in6p_sp->sp_out); 1252 #endif 1253 } 1254 break; 1255 #endif /* INET6 */ 1256 default: 1257 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1258 so->so_proto->pr_domain->dom_family)); 1259 return; 1260 } 1261 } 1262 1263 static void 1264 key_freesp_so(struct secpolicy **sp) 1265 { 1266 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1267 1268 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1269 (*sp)->policy == IPSEC_POLICY_BYPASS) 1270 return; 1271 1272 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1273 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1274 KEY_FREESP(sp); 1275 } 1276 1277 /* 1278 * Must be called after calling key_allocsa(). 1279 * This function is called by key_freesp() to free some SA allocated 1280 * for a policy. 1281 */ 1282 void 1283 key_freesav(struct secasvar **psav, const char* where, int tag) 1284 { 1285 struct secasvar *sav = *psav; 1286 1287 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1288 1289 SA_DELREF(sav); 1290 1291 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1292 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1293 sav, (u_long)ntohl(sav->spi), 1294 where, tag, sav->refcnt)); 1295 1296 if (sav->refcnt == 0) { 1297 *psav = NULL; 1298 key_delsav(sav); 1299 } 1300 } 1301 1302 /* %%% SPD management */ 1303 /* 1304 * free security policy entry. 1305 */ 1306 static void 1307 key_delsp(struct secpolicy *sp) 1308 { 1309 int s; 1310 1311 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1312 1313 key_sp_dead(sp); 1314 1315 IPSEC_ASSERT(sp->refcnt == 0, 1316 ("key_delsp: SP with references deleted (refcnt %u)", 1317 sp->refcnt)); 1318 1319 s = splsoftnet(); /*called from softclock()*/ 1320 1321 { 1322 struct ipsecrequest *isr = sp->req, *nextisr; 1323 1324 while (isr != NULL) { 1325 if (isr->sav != NULL) { 1326 KEY_FREESAV(&isr->sav); 1327 isr->sav = NULL; 1328 } 1329 1330 nextisr = isr->next; 1331 KFREE(isr); 1332 isr = nextisr; 1333 } 1334 } 1335 1336 KFREE(sp); 1337 1338 splx(s); 1339 } 1340 1341 /* 1342 * search SPD 1343 * OUT: NULL : not found 1344 * others : found, pointer to a SP. 1345 */ 1346 static struct secpolicy * 1347 key_getsp(const struct secpolicyindex *spidx) 1348 { 1349 struct secpolicy *sp; 1350 1351 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1352 1353 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1354 if (sp->state == IPSEC_SPSTATE_DEAD) 1355 continue; 1356 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1357 SP_ADDREF(sp); 1358 return sp; 1359 } 1360 } 1361 1362 return NULL; 1363 } 1364 1365 /* 1366 * get SP by index. 1367 * OUT: NULL : not found 1368 * others : found, pointer to a SP. 1369 */ 1370 static struct secpolicy * 1371 key_getspbyid(u_int32_t id) 1372 { 1373 struct secpolicy *sp; 1374 1375 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1376 if (sp->state == IPSEC_SPSTATE_DEAD) 1377 continue; 1378 if (sp->id == id) { 1379 SP_ADDREF(sp); 1380 return sp; 1381 } 1382 } 1383 1384 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1385 if (sp->state == IPSEC_SPSTATE_DEAD) 1386 continue; 1387 if (sp->id == id) { 1388 SP_ADDREF(sp); 1389 return sp; 1390 } 1391 } 1392 1393 return NULL; 1394 } 1395 1396 struct secpolicy * 1397 key_newsp(const char* where, int tag) 1398 { 1399 struct secpolicy *newsp = NULL; 1400 1401 newsp = (struct secpolicy *) 1402 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1403 if (newsp) { 1404 newsp->refcnt = 1; 1405 newsp->req = NULL; 1406 } 1407 1408 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1409 printf("DP key_newsp from %s:%u return SP:%p\n", 1410 where, tag, newsp)); 1411 return newsp; 1412 } 1413 1414 /* 1415 * create secpolicy structure from sadb_x_policy structure. 1416 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1417 * so must be set properly later. 1418 */ 1419 struct secpolicy * 1420 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1421 { 1422 struct secpolicy *newsp; 1423 1424 /* sanity check */ 1425 if (xpl0 == NULL) 1426 panic("key_msg2sp: NULL pointer was passed"); 1427 if (len < sizeof(*xpl0)) 1428 panic("key_msg2sp: invalid length"); 1429 if (len != PFKEY_EXTLEN(xpl0)) { 1430 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1431 *error = EINVAL; 1432 return NULL; 1433 } 1434 1435 if ((newsp = KEY_NEWSP()) == NULL) { 1436 *error = ENOBUFS; 1437 return NULL; 1438 } 1439 1440 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1441 newsp->policy = xpl0->sadb_x_policy_type; 1442 1443 /* check policy */ 1444 switch (xpl0->sadb_x_policy_type) { 1445 case IPSEC_POLICY_DISCARD: 1446 case IPSEC_POLICY_NONE: 1447 case IPSEC_POLICY_ENTRUST: 1448 case IPSEC_POLICY_BYPASS: 1449 newsp->req = NULL; 1450 break; 1451 1452 case IPSEC_POLICY_IPSEC: 1453 { 1454 int tlen; 1455 const struct sadb_x_ipsecrequest *xisr; 1456 uint16_t xisr_reqid; 1457 struct ipsecrequest **p_isr = &newsp->req; 1458 1459 /* validity check */ 1460 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1461 ipseclog((LOG_DEBUG, 1462 "key_msg2sp: Invalid msg length.\n")); 1463 KEY_FREESP(&newsp); 1464 *error = EINVAL; 1465 return NULL; 1466 } 1467 1468 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1469 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1470 1471 while (tlen > 0) { 1472 /* length check */ 1473 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1474 ipseclog((LOG_DEBUG, "key_msg2sp: " 1475 "invalid ipsecrequest length.\n")); 1476 KEY_FREESP(&newsp); 1477 *error = EINVAL; 1478 return NULL; 1479 } 1480 1481 /* allocate request buffer */ 1482 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1483 if ((*p_isr) == NULL) { 1484 ipseclog((LOG_DEBUG, 1485 "key_msg2sp: No more memory.\n")); 1486 KEY_FREESP(&newsp); 1487 *error = ENOBUFS; 1488 return NULL; 1489 } 1490 memset(*p_isr, 0, sizeof(**p_isr)); 1491 1492 /* set values */ 1493 (*p_isr)->next = NULL; 1494 1495 switch (xisr->sadb_x_ipsecrequest_proto) { 1496 case IPPROTO_ESP: 1497 case IPPROTO_AH: 1498 case IPPROTO_IPCOMP: 1499 break; 1500 default: 1501 ipseclog((LOG_DEBUG, 1502 "key_msg2sp: invalid proto type=%u\n", 1503 xisr->sadb_x_ipsecrequest_proto)); 1504 KEY_FREESP(&newsp); 1505 *error = EPROTONOSUPPORT; 1506 return NULL; 1507 } 1508 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1509 1510 switch (xisr->sadb_x_ipsecrequest_mode) { 1511 case IPSEC_MODE_TRANSPORT: 1512 case IPSEC_MODE_TUNNEL: 1513 break; 1514 case IPSEC_MODE_ANY: 1515 default: 1516 ipseclog((LOG_DEBUG, 1517 "key_msg2sp: invalid mode=%u\n", 1518 xisr->sadb_x_ipsecrequest_mode)); 1519 KEY_FREESP(&newsp); 1520 *error = EINVAL; 1521 return NULL; 1522 } 1523 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1524 1525 switch (xisr->sadb_x_ipsecrequest_level) { 1526 case IPSEC_LEVEL_DEFAULT: 1527 case IPSEC_LEVEL_USE: 1528 case IPSEC_LEVEL_REQUIRE: 1529 break; 1530 case IPSEC_LEVEL_UNIQUE: 1531 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1532 /* validity check */ 1533 /* 1534 * If range violation of reqid, kernel will 1535 * update it, don't refuse it. 1536 */ 1537 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1538 ipseclog((LOG_DEBUG, 1539 "key_msg2sp: reqid=%d range " 1540 "violation, updated by kernel.\n", 1541 xisr_reqid)); 1542 xisr_reqid = 0; 1543 } 1544 1545 /* allocate new reqid id if reqid is zero. */ 1546 if (xisr_reqid == 0) { 1547 u_int16_t reqid; 1548 if ((reqid = key_newreqid()) == 0) { 1549 KEY_FREESP(&newsp); 1550 *error = ENOBUFS; 1551 return NULL; 1552 } 1553 (*p_isr)->saidx.reqid = reqid; 1554 } else { 1555 /* set it for manual keying. */ 1556 (*p_isr)->saidx.reqid = xisr_reqid; 1557 } 1558 break; 1559 1560 default: 1561 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1562 xisr->sadb_x_ipsecrequest_level)); 1563 KEY_FREESP(&newsp); 1564 *error = EINVAL; 1565 return NULL; 1566 } 1567 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1568 1569 /* set IP addresses if there */ 1570 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1571 const struct sockaddr *paddr; 1572 1573 paddr = (const struct sockaddr *)(xisr + 1); 1574 1575 /* validity check */ 1576 if (paddr->sa_len 1577 > sizeof((*p_isr)->saidx.src)) { 1578 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1579 "address length.\n")); 1580 KEY_FREESP(&newsp); 1581 *error = EINVAL; 1582 return NULL; 1583 } 1584 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1585 1586 paddr = (const struct sockaddr *)((const char *)paddr 1587 + paddr->sa_len); 1588 1589 /* validity check */ 1590 if (paddr->sa_len 1591 > sizeof((*p_isr)->saidx.dst)) { 1592 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1593 "address length.\n")); 1594 KEY_FREESP(&newsp); 1595 *error = EINVAL; 1596 return NULL; 1597 } 1598 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1599 } 1600 1601 (*p_isr)->sav = NULL; 1602 (*p_isr)->sp = newsp; 1603 1604 /* initialization for the next. */ 1605 p_isr = &(*p_isr)->next; 1606 tlen -= xisr->sadb_x_ipsecrequest_len; 1607 1608 /* validity check */ 1609 if (tlen < 0) { 1610 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1611 KEY_FREESP(&newsp); 1612 *error = EINVAL; 1613 return NULL; 1614 } 1615 1616 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1617 + xisr->sadb_x_ipsecrequest_len); 1618 } 1619 } 1620 break; 1621 default: 1622 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1623 KEY_FREESP(&newsp); 1624 *error = EINVAL; 1625 return NULL; 1626 } 1627 1628 *error = 0; 1629 return newsp; 1630 } 1631 1632 static u_int16_t 1633 key_newreqid(void) 1634 { 1635 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1636 1637 auto_reqid = (auto_reqid == 0xffff 1638 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1639 1640 /* XXX should be unique check */ 1641 1642 return auto_reqid; 1643 } 1644 1645 /* 1646 * copy secpolicy struct to sadb_x_policy structure indicated. 1647 */ 1648 struct mbuf * 1649 key_sp2msg(const struct secpolicy *sp) 1650 { 1651 struct sadb_x_policy *xpl; 1652 int tlen; 1653 char *p; 1654 struct mbuf *m; 1655 1656 /* sanity check. */ 1657 if (sp == NULL) 1658 panic("key_sp2msg: NULL pointer was passed"); 1659 1660 tlen = key_getspreqmsglen(sp); 1661 1662 m = key_alloc_mbuf(tlen); 1663 if (!m || m->m_next) { /*XXX*/ 1664 if (m) 1665 m_freem(m); 1666 return NULL; 1667 } 1668 1669 m->m_len = tlen; 1670 m->m_next = NULL; 1671 xpl = mtod(m, struct sadb_x_policy *); 1672 memset(xpl, 0, tlen); 1673 1674 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1675 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1676 xpl->sadb_x_policy_type = sp->policy; 1677 xpl->sadb_x_policy_dir = sp->spidx.dir; 1678 xpl->sadb_x_policy_id = sp->id; 1679 p = (char *)xpl + sizeof(*xpl); 1680 1681 /* if is the policy for ipsec ? */ 1682 if (sp->policy == IPSEC_POLICY_IPSEC) { 1683 struct sadb_x_ipsecrequest *xisr; 1684 struct ipsecrequest *isr; 1685 1686 for (isr = sp->req; isr != NULL; isr = isr->next) { 1687 1688 xisr = (struct sadb_x_ipsecrequest *)p; 1689 1690 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1691 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1692 xisr->sadb_x_ipsecrequest_level = isr->level; 1693 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1694 1695 p += sizeof(*xisr); 1696 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1697 p += isr->saidx.src.sa.sa_len; 1698 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1699 p += isr->saidx.src.sa.sa_len; 1700 1701 xisr->sadb_x_ipsecrequest_len = 1702 PFKEY_ALIGN8(sizeof(*xisr) 1703 + isr->saidx.src.sa.sa_len 1704 + isr->saidx.dst.sa.sa_len); 1705 } 1706 } 1707 1708 return m; 1709 } 1710 1711 /* m will not be freed nor modified */ 1712 static struct mbuf * 1713 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1714 int ndeep, int nitem, ...) 1715 { 1716 va_list ap; 1717 int idx; 1718 int i; 1719 struct mbuf *result = NULL, *n; 1720 int len; 1721 1722 if (m == NULL || mhp == NULL) 1723 panic("null pointer passed to key_gather"); 1724 1725 va_start(ap, nitem); 1726 for (i = 0; i < nitem; i++) { 1727 idx = va_arg(ap, int); 1728 if (idx < 0 || idx > SADB_EXT_MAX) 1729 goto fail; 1730 /* don't attempt to pull empty extension */ 1731 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1732 continue; 1733 if (idx != SADB_EXT_RESERVED && 1734 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1735 continue; 1736 1737 if (idx == SADB_EXT_RESERVED) { 1738 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1739 #ifdef DIAGNOSTIC 1740 if (len > MHLEN) 1741 panic("assumption failed"); 1742 #endif 1743 MGETHDR(n, M_DONTWAIT, MT_DATA); 1744 if (!n) 1745 goto fail; 1746 n->m_len = len; 1747 n->m_next = NULL; 1748 m_copydata(m, 0, sizeof(struct sadb_msg), 1749 mtod(n, void *)); 1750 } else if (i < ndeep) { 1751 len = mhp->extlen[idx]; 1752 n = key_alloc_mbuf(len); 1753 if (!n || n->m_next) { /*XXX*/ 1754 if (n) 1755 m_freem(n); 1756 goto fail; 1757 } 1758 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1759 mtod(n, void *)); 1760 } else { 1761 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1762 M_DONTWAIT); 1763 } 1764 if (n == NULL) 1765 goto fail; 1766 1767 if (result) 1768 m_cat(result, n); 1769 else 1770 result = n; 1771 } 1772 va_end(ap); 1773 1774 if ((result->m_flags & M_PKTHDR) != 0) { 1775 result->m_pkthdr.len = 0; 1776 for (n = result; n; n = n->m_next) 1777 result->m_pkthdr.len += n->m_len; 1778 } 1779 1780 return result; 1781 1782 fail: 1783 va_end(ap); 1784 m_freem(result); 1785 return NULL; 1786 } 1787 1788 /* 1789 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1790 * add an entry to SP database, when received 1791 * <base, address(SD), (lifetime(H),) policy> 1792 * from the user(?). 1793 * Adding to SP database, 1794 * and send 1795 * <base, address(SD), (lifetime(H),) policy> 1796 * to the socket which was send. 1797 * 1798 * SPDADD set a unique policy entry. 1799 * SPDSETIDX like SPDADD without a part of policy requests. 1800 * SPDUPDATE replace a unique policy entry. 1801 * 1802 * m will always be freed. 1803 */ 1804 static int 1805 key_spdadd(struct socket *so, struct mbuf *m, 1806 const struct sadb_msghdr *mhp) 1807 { 1808 const struct sadb_address *src0, *dst0; 1809 const struct sadb_x_policy *xpl0; 1810 struct sadb_x_policy *xpl; 1811 const struct sadb_lifetime *lft = NULL; 1812 struct secpolicyindex spidx; 1813 struct secpolicy *newsp; 1814 int error; 1815 1816 /* sanity check */ 1817 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1818 panic("key_spdadd: NULL pointer is passed"); 1819 1820 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1821 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1822 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1823 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1824 return key_senderror(so, m, EINVAL); 1825 } 1826 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1827 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1828 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1829 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1830 return key_senderror(so, m, EINVAL); 1831 } 1832 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1833 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1834 < sizeof(struct sadb_lifetime)) { 1835 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1836 return key_senderror(so, m, EINVAL); 1837 } 1838 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1839 } 1840 1841 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1842 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1843 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1844 1845 /* make secindex */ 1846 /* XXX boundary check against sa_len */ 1847 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1848 src0 + 1, 1849 dst0 + 1, 1850 src0->sadb_address_prefixlen, 1851 dst0->sadb_address_prefixlen, 1852 src0->sadb_address_proto, 1853 &spidx); 1854 1855 /* checking the direciton. */ 1856 switch (xpl0->sadb_x_policy_dir) { 1857 case IPSEC_DIR_INBOUND: 1858 case IPSEC_DIR_OUTBOUND: 1859 break; 1860 default: 1861 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1862 mhp->msg->sadb_msg_errno = EINVAL; 1863 return 0; 1864 } 1865 1866 /* check policy */ 1867 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1868 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1869 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1870 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1871 return key_senderror(so, m, EINVAL); 1872 } 1873 1874 /* policy requests are mandatory when action is ipsec. */ 1875 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1876 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1877 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1878 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1879 return key_senderror(so, m, EINVAL); 1880 } 1881 1882 /* 1883 * checking there is SP already or not. 1884 * SPDUPDATE doesn't depend on whether there is a SP or not. 1885 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1886 * then error. 1887 */ 1888 newsp = key_getsp(&spidx); 1889 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1890 if (newsp) { 1891 key_sp_dead(newsp); 1892 key_sp_unlink(newsp); /* XXX jrs ordering */ 1893 KEY_FREESP(&newsp); 1894 newsp = NULL; 1895 } 1896 } else { 1897 if (newsp != NULL) { 1898 KEY_FREESP(&newsp); 1899 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1900 return key_senderror(so, m, EEXIST); 1901 } 1902 } 1903 1904 /* allocation new SP entry */ 1905 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1906 return key_senderror(so, m, error); 1907 } 1908 1909 if ((newsp->id = key_getnewspid()) == 0) { 1910 KFREE(newsp); 1911 return key_senderror(so, m, ENOBUFS); 1912 } 1913 1914 /* XXX boundary check against sa_len */ 1915 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1916 src0 + 1, 1917 dst0 + 1, 1918 src0->sadb_address_prefixlen, 1919 dst0->sadb_address_prefixlen, 1920 src0->sadb_address_proto, 1921 &newsp->spidx); 1922 1923 /* sanity check on addr pair */ 1924 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1925 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1926 KFREE(newsp); 1927 return key_senderror(so, m, EINVAL); 1928 } 1929 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1930 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1931 KFREE(newsp); 1932 return key_senderror(so, m, EINVAL); 1933 } 1934 1935 newsp->created = time_uptime; 1936 newsp->lastused = newsp->created; 1937 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1938 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1939 1940 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1941 newsp->state = IPSEC_SPSTATE_ALIVE; 1942 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1943 1944 /* delete the entry in spacqtree */ 1945 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1946 struct secspacq *spacq; 1947 if ((spacq = key_getspacq(&spidx)) != NULL) { 1948 /* reset counter in order to deletion by timehandler. */ 1949 spacq->created = time_uptime; 1950 spacq->count = 0; 1951 } 1952 } 1953 1954 #if defined(__NetBSD__) 1955 /* Invalidate all cached SPD pointers in the PCBs. */ 1956 ipsec_invalpcbcacheall(); 1957 1958 #if defined(GATEWAY) 1959 /* Invalidate the ipflow cache, as well. */ 1960 ipflow_invalidate_all(0); 1961 #ifdef INET6 1962 ip6flow_invalidate_all(0); 1963 #endif /* INET6 */ 1964 #endif /* GATEWAY */ 1965 #endif /* __NetBSD__ */ 1966 1967 { 1968 struct mbuf *n, *mpolicy; 1969 struct sadb_msg *newmsg; 1970 int off; 1971 1972 /* create new sadb_msg to reply. */ 1973 if (lft) { 1974 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1975 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1976 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1977 } else { 1978 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1979 SADB_X_EXT_POLICY, 1980 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1981 } 1982 if (!n) 1983 return key_senderror(so, m, ENOBUFS); 1984 1985 if (n->m_len < sizeof(*newmsg)) { 1986 n = m_pullup(n, sizeof(*newmsg)); 1987 if (!n) 1988 return key_senderror(so, m, ENOBUFS); 1989 } 1990 newmsg = mtod(n, struct sadb_msg *); 1991 newmsg->sadb_msg_errno = 0; 1992 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1993 1994 off = 0; 1995 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1996 sizeof(*xpl), &off); 1997 if (mpolicy == NULL) { 1998 /* n is already freed */ 1999 return key_senderror(so, m, ENOBUFS); 2000 } 2001 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2002 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2003 m_freem(n); 2004 return key_senderror(so, m, EINVAL); 2005 } 2006 xpl->sadb_x_policy_id = newsp->id; 2007 2008 m_freem(m); 2009 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2010 } 2011 } 2012 2013 /* 2014 * get new policy id. 2015 * OUT: 2016 * 0: failure. 2017 * others: success. 2018 */ 2019 static u_int32_t 2020 key_getnewspid(void) 2021 { 2022 u_int32_t newid = 0; 2023 int count = key_spi_trycnt; /* XXX */ 2024 struct secpolicy *sp; 2025 2026 /* when requesting to allocate spi ranged */ 2027 while (count--) { 2028 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2029 2030 if ((sp = key_getspbyid(newid)) == NULL) 2031 break; 2032 2033 KEY_FREESP(&sp); 2034 } 2035 2036 if (count == 0 || newid == 0) { 2037 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2038 return 0; 2039 } 2040 2041 return newid; 2042 } 2043 2044 /* 2045 * SADB_SPDDELETE processing 2046 * receive 2047 * <base, address(SD), policy(*)> 2048 * from the user(?), and set SADB_SASTATE_DEAD, 2049 * and send, 2050 * <base, address(SD), policy(*)> 2051 * to the ikmpd. 2052 * policy(*) including direction of policy. 2053 * 2054 * m will always be freed. 2055 */ 2056 static int 2057 key_spddelete(struct socket *so, struct mbuf *m, 2058 const struct sadb_msghdr *mhp) 2059 { 2060 struct sadb_address *src0, *dst0; 2061 struct sadb_x_policy *xpl0; 2062 struct secpolicyindex spidx; 2063 struct secpolicy *sp; 2064 2065 /* sanity check */ 2066 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2067 panic("key_spddelete: NULL pointer is passed"); 2068 2069 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2070 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2071 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2072 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2073 return key_senderror(so, m, EINVAL); 2074 } 2075 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2076 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2077 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2078 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2079 return key_senderror(so, m, EINVAL); 2080 } 2081 2082 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2083 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2084 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2085 2086 /* make secindex */ 2087 /* XXX boundary check against sa_len */ 2088 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2089 src0 + 1, 2090 dst0 + 1, 2091 src0->sadb_address_prefixlen, 2092 dst0->sadb_address_prefixlen, 2093 src0->sadb_address_proto, 2094 &spidx); 2095 2096 /* checking the direciton. */ 2097 switch (xpl0->sadb_x_policy_dir) { 2098 case IPSEC_DIR_INBOUND: 2099 case IPSEC_DIR_OUTBOUND: 2100 break; 2101 default: 2102 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2103 return key_senderror(so, m, EINVAL); 2104 } 2105 2106 /* Is there SP in SPD ? */ 2107 if ((sp = key_getsp(&spidx)) == NULL) { 2108 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2109 return key_senderror(so, m, EINVAL); 2110 } 2111 2112 /* save policy id to buffer to be returned. */ 2113 xpl0->sadb_x_policy_id = sp->id; 2114 2115 key_sp_dead(sp); 2116 key_sp_unlink(sp); /* XXX jrs ordering */ 2117 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2118 2119 #if defined(__NetBSD__) 2120 /* Invalidate all cached SPD pointers in the PCBs. */ 2121 ipsec_invalpcbcacheall(); 2122 2123 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2124 #endif /* __NetBSD__ */ 2125 2126 { 2127 struct mbuf *n; 2128 struct sadb_msg *newmsg; 2129 2130 /* create new sadb_msg to reply. */ 2131 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2132 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2133 if (!n) 2134 return key_senderror(so, m, ENOBUFS); 2135 2136 newmsg = mtod(n, struct sadb_msg *); 2137 newmsg->sadb_msg_errno = 0; 2138 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2139 2140 m_freem(m); 2141 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2142 } 2143 } 2144 2145 /* 2146 * SADB_SPDDELETE2 processing 2147 * receive 2148 * <base, policy(*)> 2149 * from the user(?), and set SADB_SASTATE_DEAD, 2150 * and send, 2151 * <base, policy(*)> 2152 * to the ikmpd. 2153 * policy(*) including direction of policy. 2154 * 2155 * m will always be freed. 2156 */ 2157 static int 2158 key_spddelete2(struct socket *so, struct mbuf *m, 2159 const struct sadb_msghdr *mhp) 2160 { 2161 u_int32_t id; 2162 struct secpolicy *sp; 2163 2164 /* sanity check */ 2165 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2166 panic("key_spddelete2: NULL pointer is passed"); 2167 2168 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2169 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2170 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2171 key_senderror(so, m, EINVAL); 2172 return 0; 2173 } 2174 2175 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2176 2177 /* Is there SP in SPD ? */ 2178 if ((sp = key_getspbyid(id)) == NULL) { 2179 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2180 return key_senderror(so, m, EINVAL); 2181 } 2182 2183 key_sp_dead(sp); 2184 key_sp_unlink(sp); /* XXX jrs ordering */ 2185 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2186 sp = NULL; 2187 2188 #if defined(__NetBSD__) 2189 /* Invalidate all cached SPD pointers in the PCBs. */ 2190 ipsec_invalpcbcacheall(); 2191 2192 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2193 #endif /* __NetBSD__ */ 2194 2195 { 2196 struct mbuf *n, *nn; 2197 struct sadb_msg *newmsg; 2198 int off, len; 2199 2200 /* create new sadb_msg to reply. */ 2201 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2202 2203 if (len > MCLBYTES) 2204 return key_senderror(so, m, ENOBUFS); 2205 MGETHDR(n, M_DONTWAIT, MT_DATA); 2206 if (n && len > MHLEN) { 2207 MCLGET(n, M_DONTWAIT); 2208 if ((n->m_flags & M_EXT) == 0) { 2209 m_freem(n); 2210 n = NULL; 2211 } 2212 } 2213 if (!n) 2214 return key_senderror(so, m, ENOBUFS); 2215 2216 n->m_len = len; 2217 n->m_next = NULL; 2218 off = 0; 2219 2220 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2221 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2222 2223 #ifdef DIAGNOSTIC 2224 if (off != len) 2225 panic("length inconsistency in key_spddelete2"); 2226 #endif 2227 2228 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2229 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2230 if (!n->m_next) { 2231 m_freem(n); 2232 return key_senderror(so, m, ENOBUFS); 2233 } 2234 2235 n->m_pkthdr.len = 0; 2236 for (nn = n; nn; nn = nn->m_next) 2237 n->m_pkthdr.len += nn->m_len; 2238 2239 newmsg = mtod(n, struct sadb_msg *); 2240 newmsg->sadb_msg_errno = 0; 2241 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2242 2243 m_freem(m); 2244 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2245 } 2246 } 2247 2248 /* 2249 * SADB_X_GET processing 2250 * receive 2251 * <base, policy(*)> 2252 * from the user(?), 2253 * and send, 2254 * <base, address(SD), policy> 2255 * to the ikmpd. 2256 * policy(*) including direction of policy. 2257 * 2258 * m will always be freed. 2259 */ 2260 static int 2261 key_spdget(struct socket *so, struct mbuf *m, 2262 const struct sadb_msghdr *mhp) 2263 { 2264 u_int32_t id; 2265 struct secpolicy *sp; 2266 struct mbuf *n; 2267 2268 /* sanity check */ 2269 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2270 panic("key_spdget: NULL pointer is passed"); 2271 2272 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2273 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2274 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2275 return key_senderror(so, m, EINVAL); 2276 } 2277 2278 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2279 2280 /* Is there SP in SPD ? */ 2281 if ((sp = key_getspbyid(id)) == NULL) { 2282 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2283 return key_senderror(so, m, ENOENT); 2284 } 2285 2286 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2287 mhp->msg->sadb_msg_pid); 2288 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2289 if (n != NULL) { 2290 m_freem(m); 2291 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2292 } else 2293 return key_senderror(so, m, ENOBUFS); 2294 } 2295 2296 /* 2297 * SADB_X_SPDACQUIRE processing. 2298 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2299 * send 2300 * <base, policy(*)> 2301 * to KMD, and expect to receive 2302 * <base> with SADB_X_SPDACQUIRE if error occurred, 2303 * or 2304 * <base, policy> 2305 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2306 * policy(*) is without policy requests. 2307 * 2308 * 0 : succeed 2309 * others: error number 2310 */ 2311 int 2312 key_spdacquire(const struct secpolicy *sp) 2313 { 2314 struct mbuf *result = NULL, *m; 2315 struct secspacq *newspacq; 2316 int error; 2317 2318 /* sanity check */ 2319 if (sp == NULL) 2320 panic("key_spdacquire: NULL pointer is passed"); 2321 if (sp->req != NULL) 2322 panic("key_spdacquire: called but there is request"); 2323 if (sp->policy != IPSEC_POLICY_IPSEC) 2324 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2325 2326 /* Get an entry to check whether sent message or not. */ 2327 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2328 if (key_blockacq_count < newspacq->count) { 2329 /* reset counter and do send message. */ 2330 newspacq->count = 0; 2331 } else { 2332 /* increment counter and do nothing. */ 2333 newspacq->count++; 2334 return 0; 2335 } 2336 } else { 2337 /* make new entry for blocking to send SADB_ACQUIRE. */ 2338 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2339 return ENOBUFS; 2340 2341 /* add to acqtree */ 2342 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2343 } 2344 2345 /* create new sadb_msg to reply. */ 2346 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2347 if (!m) { 2348 error = ENOBUFS; 2349 goto fail; 2350 } 2351 result = m; 2352 2353 result->m_pkthdr.len = 0; 2354 for (m = result; m; m = m->m_next) 2355 result->m_pkthdr.len += m->m_len; 2356 2357 mtod(result, struct sadb_msg *)->sadb_msg_len = 2358 PFKEY_UNIT64(result->m_pkthdr.len); 2359 2360 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2361 2362 fail: 2363 if (result) 2364 m_freem(result); 2365 return error; 2366 } 2367 2368 /* 2369 * SADB_SPDFLUSH processing 2370 * receive 2371 * <base> 2372 * from the user, and free all entries in secpctree. 2373 * and send, 2374 * <base> 2375 * to the user. 2376 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2377 * 2378 * m will always be freed. 2379 */ 2380 static int 2381 key_spdflush(struct socket *so, struct mbuf *m, 2382 const struct sadb_msghdr *mhp) 2383 { 2384 struct sadb_msg *newmsg; 2385 struct secpolicy *sp; 2386 u_int dir; 2387 2388 /* sanity check */ 2389 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2390 panic("key_spdflush: NULL pointer is passed"); 2391 2392 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2393 return key_senderror(so, m, EINVAL); 2394 2395 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2396 struct secpolicy * nextsp; 2397 for (sp = LIST_FIRST(&sptree[dir]); 2398 sp != NULL; 2399 sp = nextsp) { 2400 2401 nextsp = LIST_NEXT(sp, chain); 2402 if (sp->state == IPSEC_SPSTATE_DEAD) 2403 continue; 2404 key_sp_dead(sp); 2405 key_sp_unlink(sp); 2406 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2407 continue; 2408 } 2409 } 2410 2411 #if defined(__NetBSD__) 2412 /* Invalidate all cached SPD pointers in the PCBs. */ 2413 ipsec_invalpcbcacheall(); 2414 2415 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2416 #endif /* __NetBSD__ */ 2417 2418 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2419 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2420 return key_senderror(so, m, ENOBUFS); 2421 } 2422 2423 if (m->m_next) 2424 m_freem(m->m_next); 2425 m->m_next = NULL; 2426 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2427 newmsg = mtod(m, struct sadb_msg *); 2428 newmsg->sadb_msg_errno = 0; 2429 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2430 2431 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2432 } 2433 2434 static struct sockaddr key_src = { 2435 .sa_len = 2, 2436 .sa_family = PF_KEY, 2437 }; 2438 2439 static struct mbuf * 2440 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2441 { 2442 struct secpolicy *sp; 2443 int cnt; 2444 u_int dir; 2445 struct mbuf *m, *n, *prev; 2446 int totlen; 2447 2448 *lenp = 0; 2449 2450 /* search SPD entry and get buffer size. */ 2451 cnt = 0; 2452 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2453 LIST_FOREACH(sp, &sptree[dir], chain) { 2454 cnt++; 2455 } 2456 } 2457 2458 if (cnt == 0) { 2459 *errorp = ENOENT; 2460 return (NULL); 2461 } 2462 2463 m = NULL; 2464 prev = m; 2465 totlen = 0; 2466 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2467 LIST_FOREACH(sp, &sptree[dir], chain) { 2468 --cnt; 2469 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2470 2471 if (!n) { 2472 *errorp = ENOBUFS; 2473 if (m) m_freem(m); 2474 return (NULL); 2475 } 2476 2477 totlen += n->m_pkthdr.len; 2478 if (!m) { 2479 m = n; 2480 } else { 2481 prev->m_nextpkt = n; 2482 } 2483 prev = n; 2484 } 2485 } 2486 2487 *lenp = totlen; 2488 *errorp = 0; 2489 return (m); 2490 } 2491 2492 /* 2493 * SADB_SPDDUMP processing 2494 * receive 2495 * <base> 2496 * from the user, and dump all SP leaves 2497 * and send, 2498 * <base> ..... 2499 * to the ikmpd. 2500 * 2501 * m will always be freed. 2502 */ 2503 static int 2504 key_spddump(struct socket *so, struct mbuf *m0, 2505 const struct sadb_msghdr *mhp) 2506 { 2507 struct mbuf *n; 2508 int error, len; 2509 int ok, s; 2510 pid_t pid; 2511 2512 /* sanity check */ 2513 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2514 panic("key_spddump: NULL pointer is passed"); 2515 2516 2517 pid = mhp->msg->sadb_msg_pid; 2518 /* 2519 * If the requestor has insufficient socket-buffer space 2520 * for the entire chain, nobody gets any response to the DUMP. 2521 * XXX For now, only the requestor ever gets anything. 2522 * Moreover, if the requestor has any space at all, they receive 2523 * the entire chain, otherwise the request is refused with ENOBUFS. 2524 */ 2525 if (sbspace(&so->so_rcv) <= 0) { 2526 return key_senderror(so, m0, ENOBUFS); 2527 } 2528 2529 s = splsoftnet(); 2530 n = key_setspddump_chain(&error, &len, pid); 2531 splx(s); 2532 2533 if (n == NULL) { 2534 return key_senderror(so, m0, ENOENT); 2535 } 2536 { 2537 uint64_t *ps = PFKEY_STAT_GETREF(); 2538 ps[PFKEY_STAT_IN_TOTAL]++; 2539 ps[PFKEY_STAT_IN_BYTES] += len; 2540 PFKEY_STAT_PUTREF(); 2541 } 2542 2543 /* 2544 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2545 * The requestor receives either the entire chain, or an 2546 * error message with ENOBUFS. 2547 */ 2548 2549 /* 2550 * sbappendchainwith record takes the chain of entries, one 2551 * packet-record per SPD entry, prepends the key_src sockaddr 2552 * to each packet-record, links the sockaddr mbufs into a new 2553 * list of records, then appends the entire resulting 2554 * list to the requesting socket. 2555 */ 2556 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2557 n, SB_PRIO_ONESHOT_OVERFLOW); 2558 2559 if (!ok) { 2560 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2561 m_freem(n); 2562 return key_senderror(so, m0, ENOBUFS); 2563 } 2564 2565 m_freem(m0); 2566 return error; 2567 } 2568 2569 /* 2570 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2571 */ 2572 static int 2573 key_nat_map(struct socket *so, struct mbuf *m, 2574 const struct sadb_msghdr *mhp) 2575 { 2576 struct sadb_x_nat_t_type *type; 2577 struct sadb_x_nat_t_port *sport; 2578 struct sadb_x_nat_t_port *dport; 2579 struct sadb_address *iaddr, *raddr; 2580 struct sadb_x_nat_t_frag *frag; 2581 2582 /* sanity check */ 2583 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2584 panic("key_nat_map: NULL pointer is passed."); 2585 2586 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2587 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2588 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2589 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2590 return key_senderror(so, m, EINVAL); 2591 } 2592 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2593 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2594 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2595 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2596 return key_senderror(so, m, EINVAL); 2597 } 2598 2599 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2600 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2601 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2602 return key_senderror(so, m, EINVAL); 2603 } 2604 2605 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2606 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2607 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2608 return key_senderror(so, m, EINVAL); 2609 } 2610 2611 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2612 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2613 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2614 return key_senderror(so, m, EINVAL); 2615 } 2616 2617 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2618 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2619 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2620 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2621 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2622 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2623 2624 printf("sadb_nat_map called\n"); 2625 2626 /* 2627 * XXX handle that, it should also contain a SA, or anything 2628 * that enable to update the SA information. 2629 */ 2630 2631 return 0; 2632 } 2633 2634 static struct mbuf * 2635 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2636 { 2637 struct mbuf *result = NULL, *m; 2638 2639 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2640 if (!m) 2641 goto fail; 2642 result = m; 2643 2644 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2645 &sp->spidx.src.sa, sp->spidx.prefs, 2646 sp->spidx.ul_proto); 2647 if (!m) 2648 goto fail; 2649 m_cat(result, m); 2650 2651 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2652 &sp->spidx.dst.sa, sp->spidx.prefd, 2653 sp->spidx.ul_proto); 2654 if (!m) 2655 goto fail; 2656 m_cat(result, m); 2657 2658 m = key_sp2msg(sp); 2659 if (!m) 2660 goto fail; 2661 m_cat(result, m); 2662 2663 if ((result->m_flags & M_PKTHDR) == 0) 2664 goto fail; 2665 2666 if (result->m_len < sizeof(struct sadb_msg)) { 2667 result = m_pullup(result, sizeof(struct sadb_msg)); 2668 if (result == NULL) 2669 goto fail; 2670 } 2671 2672 result->m_pkthdr.len = 0; 2673 for (m = result; m; m = m->m_next) 2674 result->m_pkthdr.len += m->m_len; 2675 2676 mtod(result, struct sadb_msg *)->sadb_msg_len = 2677 PFKEY_UNIT64(result->m_pkthdr.len); 2678 2679 return result; 2680 2681 fail: 2682 m_freem(result); 2683 return NULL; 2684 } 2685 2686 /* 2687 * get PFKEY message length for security policy and request. 2688 */ 2689 static u_int 2690 key_getspreqmsglen(const struct secpolicy *sp) 2691 { 2692 u_int tlen; 2693 2694 tlen = sizeof(struct sadb_x_policy); 2695 2696 /* if is the policy for ipsec ? */ 2697 if (sp->policy != IPSEC_POLICY_IPSEC) 2698 return tlen; 2699 2700 /* get length of ipsec requests */ 2701 { 2702 const struct ipsecrequest *isr; 2703 int len; 2704 2705 for (isr = sp->req; isr != NULL; isr = isr->next) { 2706 len = sizeof(struct sadb_x_ipsecrequest) 2707 + isr->saidx.src.sa.sa_len 2708 + isr->saidx.dst.sa.sa_len; 2709 2710 tlen += PFKEY_ALIGN8(len); 2711 } 2712 } 2713 2714 return tlen; 2715 } 2716 2717 /* 2718 * SADB_SPDEXPIRE processing 2719 * send 2720 * <base, address(SD), lifetime(CH), policy> 2721 * to KMD by PF_KEY. 2722 * 2723 * OUT: 0 : succeed 2724 * others : error number 2725 */ 2726 static int 2727 key_spdexpire(struct secpolicy *sp) 2728 { 2729 int s; 2730 struct mbuf *result = NULL, *m; 2731 int len; 2732 int error = -1; 2733 struct sadb_lifetime *lt; 2734 2735 /* XXX: Why do we lock ? */ 2736 s = splsoftnet(); /*called from softclock()*/ 2737 2738 /* sanity check */ 2739 if (sp == NULL) 2740 panic("key_spdexpire: NULL pointer is passed"); 2741 2742 /* set msg header */ 2743 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2744 if (!m) { 2745 error = ENOBUFS; 2746 goto fail; 2747 } 2748 result = m; 2749 2750 /* create lifetime extension (current and hard) */ 2751 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2752 m = key_alloc_mbuf(len); 2753 if (!m || m->m_next) { /*XXX*/ 2754 if (m) 2755 m_freem(m); 2756 error = ENOBUFS; 2757 goto fail; 2758 } 2759 memset(mtod(m, void *), 0, len); 2760 lt = mtod(m, struct sadb_lifetime *); 2761 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2762 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2763 lt->sadb_lifetime_allocations = 0; 2764 lt->sadb_lifetime_bytes = 0; 2765 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2766 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2767 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2768 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2769 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2770 lt->sadb_lifetime_allocations = 0; 2771 lt->sadb_lifetime_bytes = 0; 2772 lt->sadb_lifetime_addtime = sp->lifetime; 2773 lt->sadb_lifetime_usetime = sp->validtime; 2774 m_cat(result, m); 2775 2776 /* set sadb_address for source */ 2777 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2778 &sp->spidx.src.sa, 2779 sp->spidx.prefs, sp->spidx.ul_proto); 2780 if (!m) { 2781 error = ENOBUFS; 2782 goto fail; 2783 } 2784 m_cat(result, m); 2785 2786 /* set sadb_address for destination */ 2787 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2788 &sp->spidx.dst.sa, 2789 sp->spidx.prefd, sp->spidx.ul_proto); 2790 if (!m) { 2791 error = ENOBUFS; 2792 goto fail; 2793 } 2794 m_cat(result, m); 2795 2796 /* set secpolicy */ 2797 m = key_sp2msg(sp); 2798 if (!m) { 2799 error = ENOBUFS; 2800 goto fail; 2801 } 2802 m_cat(result, m); 2803 2804 if ((result->m_flags & M_PKTHDR) == 0) { 2805 error = EINVAL; 2806 goto fail; 2807 } 2808 2809 if (result->m_len < sizeof(struct sadb_msg)) { 2810 result = m_pullup(result, sizeof(struct sadb_msg)); 2811 if (result == NULL) { 2812 error = ENOBUFS; 2813 goto fail; 2814 } 2815 } 2816 2817 result->m_pkthdr.len = 0; 2818 for (m = result; m; m = m->m_next) 2819 result->m_pkthdr.len += m->m_len; 2820 2821 mtod(result, struct sadb_msg *)->sadb_msg_len = 2822 PFKEY_UNIT64(result->m_pkthdr.len); 2823 2824 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2825 2826 fail: 2827 if (result) 2828 m_freem(result); 2829 splx(s); 2830 return error; 2831 } 2832 2833 /* %%% SAD management */ 2834 /* 2835 * allocating a memory for new SA head, and copy from the values of mhp. 2836 * OUT: NULL : failure due to the lack of memory. 2837 * others : pointer to new SA head. 2838 */ 2839 static struct secashead * 2840 key_newsah(const struct secasindex *saidx) 2841 { 2842 struct secashead *newsah; 2843 2844 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2845 2846 newsah = (struct secashead *) 2847 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2848 if (newsah != NULL) { 2849 int i; 2850 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2851 LIST_INIT(&newsah->savtree[i]); 2852 newsah->saidx = *saidx; 2853 2854 /* add to saidxtree */ 2855 newsah->state = SADB_SASTATE_MATURE; 2856 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2857 } 2858 return(newsah); 2859 } 2860 2861 /* 2862 * delete SA index and all SA registerd. 2863 */ 2864 static void 2865 key_delsah(struct secashead *sah) 2866 { 2867 struct secasvar *sav, *nextsav; 2868 u_int stateidx, state; 2869 int s; 2870 int zombie = 0; 2871 2872 /* sanity check */ 2873 if (sah == NULL) 2874 panic("key_delsah: NULL pointer is passed"); 2875 2876 s = splsoftnet(); /*called from softclock()*/ 2877 2878 /* searching all SA registerd in the secindex. */ 2879 for (stateidx = 0; 2880 stateidx < _ARRAYLEN(saorder_state_any); 2881 stateidx++) { 2882 2883 state = saorder_state_any[stateidx]; 2884 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2885 sav != NULL; 2886 sav = nextsav) { 2887 2888 nextsav = LIST_NEXT(sav, chain); 2889 2890 if (sav->refcnt == 0) { 2891 /* sanity check */ 2892 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2893 KEY_FREESAV(&sav); 2894 } else { 2895 /* give up to delete this sa */ 2896 zombie++; 2897 } 2898 } 2899 } 2900 2901 /* don't delete sah only if there are savs. */ 2902 if (zombie) { 2903 splx(s); 2904 return; 2905 } 2906 2907 rtcache_free(&sah->sa_route); 2908 2909 /* remove from tree of SA index */ 2910 if (__LIST_CHAINED(sah)) 2911 LIST_REMOVE(sah, chain); 2912 2913 KFREE(sah); 2914 2915 splx(s); 2916 return; 2917 } 2918 2919 /* 2920 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2921 * and copy the values of mhp into new buffer. 2922 * When SAD message type is GETSPI: 2923 * to set sequence number from acq_seq++, 2924 * to set zero to SPI. 2925 * not to call key_setsava(). 2926 * OUT: NULL : fail 2927 * others : pointer to new secasvar. 2928 * 2929 * does not modify mbuf. does not free mbuf on error. 2930 */ 2931 static struct secasvar * 2932 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2933 struct secashead *sah, int *errp, 2934 const char* where, int tag) 2935 { 2936 struct secasvar *newsav; 2937 const struct sadb_sa *xsa; 2938 2939 /* sanity check */ 2940 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2941 panic("key_newsa: NULL pointer is passed"); 2942 2943 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2944 if (newsav == NULL) { 2945 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2946 *errp = ENOBUFS; 2947 goto done; 2948 } 2949 memset(newsav, 0, sizeof(struct secasvar)); 2950 2951 switch (mhp->msg->sadb_msg_type) { 2952 case SADB_GETSPI: 2953 newsav->spi = 0; 2954 2955 #ifdef IPSEC_DOSEQCHECK 2956 /* sync sequence number */ 2957 if (mhp->msg->sadb_msg_seq == 0) 2958 newsav->seq = 2959 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2960 else 2961 #endif 2962 newsav->seq = mhp->msg->sadb_msg_seq; 2963 break; 2964 2965 case SADB_ADD: 2966 /* sanity check */ 2967 if (mhp->ext[SADB_EXT_SA] == NULL) { 2968 KFREE(newsav), newsav = NULL; 2969 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2970 *errp = EINVAL; 2971 goto done; 2972 } 2973 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2974 newsav->spi = xsa->sadb_sa_spi; 2975 newsav->seq = mhp->msg->sadb_msg_seq; 2976 break; 2977 default: 2978 KFREE(newsav), newsav = NULL; 2979 *errp = EINVAL; 2980 goto done; 2981 } 2982 2983 /* copy sav values */ 2984 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2985 *errp = key_setsaval(newsav, m, mhp); 2986 if (*errp) { 2987 KFREE(newsav), newsav = NULL; 2988 goto done; 2989 } 2990 } 2991 2992 /* reset created */ 2993 newsav->created = time_uptime; 2994 newsav->pid = mhp->msg->sadb_msg_pid; 2995 2996 /* add to satree */ 2997 newsav->sah = sah; 2998 newsav->refcnt = 1; 2999 newsav->state = SADB_SASTATE_LARVAL; 3000 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3001 secasvar, chain); 3002 done: 3003 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3004 printf("DP key_newsav from %s:%u return SP:%p\n", 3005 where, tag, newsav)); 3006 3007 return newsav; 3008 } 3009 3010 /* 3011 * free() SA variable entry. 3012 */ 3013 static void 3014 key_delsav(struct secasvar *sav) 3015 { 3016 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3017 IPSEC_ASSERT(sav->refcnt == 0, 3018 ("key_delsav: reference count %u > 0", sav->refcnt)); 3019 3020 /* remove from SA header */ 3021 if (__LIST_CHAINED(sav)) 3022 LIST_REMOVE(sav, chain); 3023 3024 /* 3025 * Cleanup xform state. Note that zeroize'ing causes the 3026 * keys to be cleared; otherwise we must do it ourself. 3027 */ 3028 if (sav->tdb_xform != NULL) { 3029 sav->tdb_xform->xf_zeroize(sav); 3030 sav->tdb_xform = NULL; 3031 } else { 3032 if (sav->key_auth != NULL) 3033 explicit_bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 3034 if (sav->key_enc != NULL) 3035 explicit_bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 3036 } 3037 if (sav->key_auth != NULL) { 3038 KFREE(sav->key_auth); 3039 sav->key_auth = NULL; 3040 } 3041 if (sav->key_enc != NULL) { 3042 KFREE(sav->key_enc); 3043 sav->key_enc = NULL; 3044 } 3045 if (sav->replay != NULL) { 3046 KFREE(sav->replay); 3047 sav->replay = NULL; 3048 } 3049 if (sav->lft_c != NULL) { 3050 KFREE(sav->lft_c); 3051 sav->lft_c = NULL; 3052 } 3053 if (sav->lft_h != NULL) { 3054 KFREE(sav->lft_h); 3055 sav->lft_h = NULL; 3056 } 3057 if (sav->lft_s != NULL) { 3058 KFREE(sav->lft_s); 3059 sav->lft_s = NULL; 3060 } 3061 3062 KFREE(sav); 3063 3064 return; 3065 } 3066 3067 /* 3068 * search SAD. 3069 * OUT: 3070 * NULL : not found 3071 * others : found, pointer to a SA. 3072 */ 3073 static struct secashead * 3074 key_getsah(const struct secasindex *saidx) 3075 { 3076 struct secashead *sah; 3077 3078 LIST_FOREACH(sah, &sahtree, chain) { 3079 if (sah->state == SADB_SASTATE_DEAD) 3080 continue; 3081 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3082 return sah; 3083 } 3084 3085 return NULL; 3086 } 3087 3088 /* 3089 * check not to be duplicated SPI. 3090 * NOTE: this function is too slow due to searching all SAD. 3091 * OUT: 3092 * NULL : not found 3093 * others : found, pointer to a SA. 3094 */ 3095 static struct secasvar * 3096 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3097 { 3098 struct secashead *sah; 3099 struct secasvar *sav; 3100 3101 /* check address family */ 3102 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3103 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3104 return NULL; 3105 } 3106 3107 /* check all SAD */ 3108 LIST_FOREACH(sah, &sahtree, chain) { 3109 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3110 continue; 3111 sav = key_getsavbyspi(sah, spi); 3112 if (sav != NULL) 3113 return sav; 3114 } 3115 3116 return NULL; 3117 } 3118 3119 /* 3120 * search SAD litmited alive SA, protocol, SPI. 3121 * OUT: 3122 * NULL : not found 3123 * others : found, pointer to a SA. 3124 */ 3125 static struct secasvar * 3126 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3127 { 3128 struct secasvar *sav; 3129 u_int stateidx, state; 3130 3131 /* search all status */ 3132 for (stateidx = 0; 3133 stateidx < _ARRAYLEN(saorder_state_alive); 3134 stateidx++) { 3135 3136 state = saorder_state_alive[stateidx]; 3137 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3138 3139 /* sanity check */ 3140 if (sav->state != state) { 3141 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3142 "invalid sav->state (queue: %d SA: %d)\n", 3143 state, sav->state)); 3144 continue; 3145 } 3146 3147 if (sav->spi == spi) 3148 return sav; 3149 } 3150 } 3151 3152 return NULL; 3153 } 3154 3155 /* 3156 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3157 * You must update these if need. 3158 * OUT: 0: success. 3159 * !0: failure. 3160 * 3161 * does not modify mbuf. does not free mbuf on error. 3162 */ 3163 static int 3164 key_setsaval(struct secasvar *sav, struct mbuf *m, 3165 const struct sadb_msghdr *mhp) 3166 { 3167 int error = 0; 3168 3169 /* sanity check */ 3170 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3171 panic("key_setsaval: NULL pointer is passed"); 3172 3173 /* initialization */ 3174 sav->replay = NULL; 3175 sav->key_auth = NULL; 3176 sav->key_enc = NULL; 3177 sav->lft_c = NULL; 3178 sav->lft_h = NULL; 3179 sav->lft_s = NULL; 3180 sav->tdb_xform = NULL; /* transform */ 3181 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3182 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3183 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3184 sav->natt_type = 0; 3185 sav->esp_frag = 0; 3186 3187 /* SA */ 3188 if (mhp->ext[SADB_EXT_SA] != NULL) { 3189 const struct sadb_sa *sa0; 3190 3191 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3192 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3193 error = EINVAL; 3194 goto fail; 3195 } 3196 3197 sav->alg_auth = sa0->sadb_sa_auth; 3198 sav->alg_enc = sa0->sadb_sa_encrypt; 3199 sav->flags = sa0->sadb_sa_flags; 3200 3201 /* replay window */ 3202 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3203 sav->replay = (struct secreplay *) 3204 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3205 if (sav->replay == NULL) { 3206 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3207 error = ENOBUFS; 3208 goto fail; 3209 } 3210 if (sa0->sadb_sa_replay != 0) 3211 sav->replay->bitmap = (char*)(sav->replay+1); 3212 sav->replay->wsize = sa0->sadb_sa_replay; 3213 } 3214 } 3215 3216 /* Authentication keys */ 3217 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3218 const struct sadb_key *key0; 3219 int len; 3220 3221 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3222 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3223 3224 error = 0; 3225 if (len < sizeof(*key0)) { 3226 error = EINVAL; 3227 goto fail; 3228 } 3229 switch (mhp->msg->sadb_msg_satype) { 3230 case SADB_SATYPE_AH: 3231 case SADB_SATYPE_ESP: 3232 case SADB_X_SATYPE_TCPSIGNATURE: 3233 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3234 sav->alg_auth != SADB_X_AALG_NULL) 3235 error = EINVAL; 3236 break; 3237 case SADB_X_SATYPE_IPCOMP: 3238 default: 3239 error = EINVAL; 3240 break; 3241 } 3242 if (error) { 3243 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3244 goto fail; 3245 } 3246 3247 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3248 if (sav->key_auth == NULL) { 3249 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3250 error = ENOBUFS; 3251 goto fail; 3252 } 3253 } 3254 3255 /* Encryption key */ 3256 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3257 const struct sadb_key *key0; 3258 int len; 3259 3260 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3261 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3262 3263 error = 0; 3264 if (len < sizeof(*key0)) { 3265 error = EINVAL; 3266 goto fail; 3267 } 3268 switch (mhp->msg->sadb_msg_satype) { 3269 case SADB_SATYPE_ESP: 3270 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3271 sav->alg_enc != SADB_EALG_NULL) { 3272 error = EINVAL; 3273 break; 3274 } 3275 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3276 if (sav->key_enc == NULL) { 3277 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3278 error = ENOBUFS; 3279 goto fail; 3280 } 3281 break; 3282 case SADB_X_SATYPE_IPCOMP: 3283 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3284 error = EINVAL; 3285 sav->key_enc = NULL; /*just in case*/ 3286 break; 3287 case SADB_SATYPE_AH: 3288 case SADB_X_SATYPE_TCPSIGNATURE: 3289 default: 3290 error = EINVAL; 3291 break; 3292 } 3293 if (error) { 3294 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3295 goto fail; 3296 } 3297 } 3298 3299 /* set iv */ 3300 sav->ivlen = 0; 3301 3302 switch (mhp->msg->sadb_msg_satype) { 3303 case SADB_SATYPE_AH: 3304 error = xform_init(sav, XF_AH); 3305 break; 3306 case SADB_SATYPE_ESP: 3307 error = xform_init(sav, XF_ESP); 3308 break; 3309 case SADB_X_SATYPE_IPCOMP: 3310 error = xform_init(sav, XF_IPCOMP); 3311 break; 3312 case SADB_X_SATYPE_TCPSIGNATURE: 3313 error = xform_init(sav, XF_TCPSIGNATURE); 3314 break; 3315 } 3316 if (error) { 3317 ipseclog((LOG_DEBUG, 3318 "key_setsaval: unable to initialize SA type %u.\n", 3319 mhp->msg->sadb_msg_satype)); 3320 goto fail; 3321 } 3322 3323 /* reset created */ 3324 sav->created = time_uptime; 3325 3326 /* make lifetime for CURRENT */ 3327 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3328 sizeof(struct sadb_lifetime)); 3329 if (sav->lft_c == NULL) { 3330 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3331 error = ENOBUFS; 3332 goto fail; 3333 } 3334 3335 sav->lft_c->sadb_lifetime_len = 3336 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3337 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3338 sav->lft_c->sadb_lifetime_allocations = 0; 3339 sav->lft_c->sadb_lifetime_bytes = 0; 3340 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3341 sav->lft_c->sadb_lifetime_usetime = 0; 3342 3343 /* lifetimes for HARD and SOFT */ 3344 { 3345 const struct sadb_lifetime *lft0; 3346 3347 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3348 if (lft0 != NULL) { 3349 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3350 error = EINVAL; 3351 goto fail; 3352 } 3353 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3354 sizeof(*lft0)); 3355 if (sav->lft_h == NULL) { 3356 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3357 error = ENOBUFS; 3358 goto fail; 3359 } 3360 /* to be initialize ? */ 3361 } 3362 3363 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3364 if (lft0 != NULL) { 3365 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3366 error = EINVAL; 3367 goto fail; 3368 } 3369 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3370 sizeof(*lft0)); 3371 if (sav->lft_s == NULL) { 3372 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3373 error = ENOBUFS; 3374 goto fail; 3375 } 3376 /* to be initialize ? */ 3377 } 3378 } 3379 3380 return 0; 3381 3382 fail: 3383 /* initialization */ 3384 if (sav->replay != NULL) { 3385 KFREE(sav->replay); 3386 sav->replay = NULL; 3387 } 3388 if (sav->key_auth != NULL) { 3389 KFREE(sav->key_auth); 3390 sav->key_auth = NULL; 3391 } 3392 if (sav->key_enc != NULL) { 3393 KFREE(sav->key_enc); 3394 sav->key_enc = NULL; 3395 } 3396 if (sav->lft_c != NULL) { 3397 KFREE(sav->lft_c); 3398 sav->lft_c = NULL; 3399 } 3400 if (sav->lft_h != NULL) { 3401 KFREE(sav->lft_h); 3402 sav->lft_h = NULL; 3403 } 3404 if (sav->lft_s != NULL) { 3405 KFREE(sav->lft_s); 3406 sav->lft_s = NULL; 3407 } 3408 3409 return error; 3410 } 3411 3412 /* 3413 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3414 * OUT: 0: valid 3415 * other: errno 3416 */ 3417 static int 3418 key_mature(struct secasvar *sav) 3419 { 3420 int error; 3421 3422 /* check SPI value */ 3423 switch (sav->sah->saidx.proto) { 3424 case IPPROTO_ESP: 3425 case IPPROTO_AH: 3426 if (ntohl(sav->spi) <= 255) { 3427 ipseclog((LOG_DEBUG, 3428 "key_mature: illegal range of SPI %u.\n", 3429 (u_int32_t)ntohl(sav->spi))); 3430 return EINVAL; 3431 } 3432 break; 3433 } 3434 3435 /* check satype */ 3436 switch (sav->sah->saidx.proto) { 3437 case IPPROTO_ESP: 3438 /* check flags */ 3439 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3440 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3441 ipseclog((LOG_DEBUG, "key_mature: " 3442 "invalid flag (derived) given to old-esp.\n")); 3443 return EINVAL; 3444 } 3445 error = xform_init(sav, XF_ESP); 3446 break; 3447 case IPPROTO_AH: 3448 /* check flags */ 3449 if (sav->flags & SADB_X_EXT_DERIV) { 3450 ipseclog((LOG_DEBUG, "key_mature: " 3451 "invalid flag (derived) given to AH SA.\n")); 3452 return EINVAL; 3453 } 3454 if (sav->alg_enc != SADB_EALG_NONE) { 3455 ipseclog((LOG_DEBUG, "key_mature: " 3456 "protocol and algorithm mismated.\n")); 3457 return(EINVAL); 3458 } 3459 error = xform_init(sav, XF_AH); 3460 break; 3461 case IPPROTO_IPCOMP: 3462 if (sav->alg_auth != SADB_AALG_NONE) { 3463 ipseclog((LOG_DEBUG, "key_mature: " 3464 "protocol and algorithm mismated.\n")); 3465 return(EINVAL); 3466 } 3467 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3468 && ntohl(sav->spi) >= 0x10000) { 3469 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3470 return(EINVAL); 3471 } 3472 error = xform_init(sav, XF_IPCOMP); 3473 break; 3474 case IPPROTO_TCP: 3475 if (sav->alg_enc != SADB_EALG_NONE) { 3476 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3477 "mismated.\n", __func__)); 3478 return(EINVAL); 3479 } 3480 error = xform_init(sav, XF_TCPSIGNATURE); 3481 break; 3482 default: 3483 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3484 error = EPROTONOSUPPORT; 3485 break; 3486 } 3487 if (error == 0) 3488 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3489 return (error); 3490 } 3491 3492 /* 3493 * subroutine for SADB_GET and SADB_DUMP. 3494 */ 3495 static struct mbuf * 3496 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3497 u_int32_t seq, u_int32_t pid) 3498 { 3499 struct mbuf *result = NULL, *tres = NULL, *m; 3500 int l = 0; 3501 int i; 3502 void *p; 3503 struct sadb_lifetime lt; 3504 int dumporder[] = { 3505 SADB_EXT_SA, SADB_X_EXT_SA2, 3506 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3507 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3508 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3509 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3510 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3511 SADB_X_EXT_NAT_T_TYPE, 3512 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3513 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3514 SADB_X_EXT_NAT_T_FRAG, 3515 3516 }; 3517 3518 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3519 if (m == NULL) 3520 goto fail; 3521 result = m; 3522 3523 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3524 m = NULL; 3525 p = NULL; 3526 switch (dumporder[i]) { 3527 case SADB_EXT_SA: 3528 m = key_setsadbsa(sav); 3529 break; 3530 3531 case SADB_X_EXT_SA2: 3532 m = key_setsadbxsa2(sav->sah->saidx.mode, 3533 sav->replay ? sav->replay->count : 0, 3534 sav->sah->saidx.reqid); 3535 break; 3536 3537 case SADB_EXT_ADDRESS_SRC: 3538 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3539 &sav->sah->saidx.src.sa, 3540 FULLMASK, IPSEC_ULPROTO_ANY); 3541 break; 3542 3543 case SADB_EXT_ADDRESS_DST: 3544 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3545 &sav->sah->saidx.dst.sa, 3546 FULLMASK, IPSEC_ULPROTO_ANY); 3547 break; 3548 3549 case SADB_EXT_KEY_AUTH: 3550 if (!sav->key_auth) 3551 continue; 3552 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3553 p = sav->key_auth; 3554 break; 3555 3556 case SADB_EXT_KEY_ENCRYPT: 3557 if (!sav->key_enc) 3558 continue; 3559 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3560 p = sav->key_enc; 3561 break; 3562 3563 case SADB_EXT_LIFETIME_CURRENT: 3564 if (!sav->lft_c) 3565 continue; 3566 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3567 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3568 lt.sadb_lifetime_addtime += time_second - time_uptime; 3569 lt.sadb_lifetime_usetime += time_second - time_uptime; 3570 p = < 3571 break; 3572 3573 case SADB_EXT_LIFETIME_HARD: 3574 if (!sav->lft_h) 3575 continue; 3576 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3577 p = sav->lft_h; 3578 break; 3579 3580 case SADB_EXT_LIFETIME_SOFT: 3581 if (!sav->lft_s) 3582 continue; 3583 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3584 p = sav->lft_s; 3585 break; 3586 3587 case SADB_X_EXT_NAT_T_TYPE: 3588 m = key_setsadbxtype(sav->natt_type); 3589 break; 3590 3591 case SADB_X_EXT_NAT_T_DPORT: 3592 if (sav->natt_type == 0) 3593 continue; 3594 m = key_setsadbxport( 3595 key_portfromsaddr(&sav->sah->saidx.dst), 3596 SADB_X_EXT_NAT_T_DPORT); 3597 break; 3598 3599 case SADB_X_EXT_NAT_T_SPORT: 3600 if (sav->natt_type == 0) 3601 continue; 3602 m = key_setsadbxport( 3603 key_portfromsaddr(&sav->sah->saidx.src), 3604 SADB_X_EXT_NAT_T_SPORT); 3605 break; 3606 3607 case SADB_X_EXT_NAT_T_FRAG: 3608 /* don't send frag info if not set */ 3609 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3610 continue; 3611 m = key_setsadbxfrag(sav->esp_frag); 3612 break; 3613 3614 case SADB_X_EXT_NAT_T_OAI: 3615 case SADB_X_EXT_NAT_T_OAR: 3616 continue; 3617 3618 case SADB_EXT_ADDRESS_PROXY: 3619 case SADB_EXT_IDENTITY_SRC: 3620 case SADB_EXT_IDENTITY_DST: 3621 /* XXX: should we brought from SPD ? */ 3622 case SADB_EXT_SENSITIVITY: 3623 default: 3624 continue; 3625 } 3626 3627 KASSERT(!(m && p)); 3628 if (!m && !p) 3629 goto fail; 3630 if (p && tres) { 3631 M_PREPEND(tres, l, M_DONTWAIT); 3632 if (!tres) 3633 goto fail; 3634 memcpy(mtod(tres, void *), p, l); 3635 continue; 3636 } 3637 if (p) { 3638 m = key_alloc_mbuf(l); 3639 if (!m) 3640 goto fail; 3641 m_copyback(m, 0, l, p); 3642 } 3643 3644 if (tres) 3645 m_cat(m, tres); 3646 tres = m; 3647 } 3648 3649 m_cat(result, tres); 3650 tres = NULL; /* avoid free on error below */ 3651 3652 if (result->m_len < sizeof(struct sadb_msg)) { 3653 result = m_pullup(result, sizeof(struct sadb_msg)); 3654 if (result == NULL) 3655 goto fail; 3656 } 3657 3658 result->m_pkthdr.len = 0; 3659 for (m = result; m; m = m->m_next) 3660 result->m_pkthdr.len += m->m_len; 3661 3662 mtod(result, struct sadb_msg *)->sadb_msg_len = 3663 PFKEY_UNIT64(result->m_pkthdr.len); 3664 3665 return result; 3666 3667 fail: 3668 m_freem(result); 3669 m_freem(tres); 3670 return NULL; 3671 } 3672 3673 3674 /* 3675 * set a type in sadb_x_nat_t_type 3676 */ 3677 static struct mbuf * 3678 key_setsadbxtype(u_int16_t type) 3679 { 3680 struct mbuf *m; 3681 size_t len; 3682 struct sadb_x_nat_t_type *p; 3683 3684 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3685 3686 m = key_alloc_mbuf(len); 3687 if (!m || m->m_next) { /*XXX*/ 3688 if (m) 3689 m_freem(m); 3690 return NULL; 3691 } 3692 3693 p = mtod(m, struct sadb_x_nat_t_type *); 3694 3695 memset(p, 0, len); 3696 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3697 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3698 p->sadb_x_nat_t_type_type = type; 3699 3700 return m; 3701 } 3702 /* 3703 * set a port in sadb_x_nat_t_port. port is in network order 3704 */ 3705 static struct mbuf * 3706 key_setsadbxport(u_int16_t port, u_int16_t type) 3707 { 3708 struct mbuf *m; 3709 size_t len; 3710 struct sadb_x_nat_t_port *p; 3711 3712 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3713 3714 m = key_alloc_mbuf(len); 3715 if (!m || m->m_next) { /*XXX*/ 3716 if (m) 3717 m_freem(m); 3718 return NULL; 3719 } 3720 3721 p = mtod(m, struct sadb_x_nat_t_port *); 3722 3723 memset(p, 0, len); 3724 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3725 p->sadb_x_nat_t_port_exttype = type; 3726 p->sadb_x_nat_t_port_port = port; 3727 3728 return m; 3729 } 3730 3731 /* 3732 * set fragmentation info in sadb_x_nat_t_frag 3733 */ 3734 static struct mbuf * 3735 key_setsadbxfrag(u_int16_t flen) 3736 { 3737 struct mbuf *m; 3738 size_t len; 3739 struct sadb_x_nat_t_frag *p; 3740 3741 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3742 3743 m = key_alloc_mbuf(len); 3744 if (!m || m->m_next) { /*XXX*/ 3745 if (m) 3746 m_freem(m); 3747 return NULL; 3748 } 3749 3750 p = mtod(m, struct sadb_x_nat_t_frag *); 3751 3752 memset(p, 0, len); 3753 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3754 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3755 p->sadb_x_nat_t_frag_fraglen = flen; 3756 3757 return m; 3758 } 3759 3760 /* 3761 * Get port from sockaddr, port is in network order 3762 */ 3763 u_int16_t 3764 key_portfromsaddr(const union sockaddr_union *saddr) 3765 { 3766 u_int16_t port; 3767 3768 switch (saddr->sa.sa_family) { 3769 case AF_INET: { 3770 port = saddr->sin.sin_port; 3771 break; 3772 } 3773 #ifdef INET6 3774 case AF_INET6: { 3775 port = saddr->sin6.sin6_port; 3776 break; 3777 } 3778 #endif 3779 default: 3780 printf("key_portfromsaddr: unexpected address family\n"); 3781 port = 0; 3782 break; 3783 } 3784 3785 return port; 3786 } 3787 3788 3789 /* 3790 * Set port is struct sockaddr. port is in network order 3791 */ 3792 static void 3793 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3794 { 3795 switch (saddr->sa.sa_family) { 3796 case AF_INET: { 3797 saddr->sin.sin_port = port; 3798 break; 3799 } 3800 #ifdef INET6 3801 case AF_INET6: { 3802 saddr->sin6.sin6_port = port; 3803 break; 3804 } 3805 #endif 3806 default: 3807 printf("key_porttosaddr: unexpected address family %d\n", 3808 saddr->sa.sa_family); 3809 break; 3810 } 3811 3812 return; 3813 } 3814 3815 /* 3816 * Safety check sa_len 3817 */ 3818 static int 3819 key_checksalen(const union sockaddr_union *saddr) 3820 { 3821 switch (saddr->sa.sa_family) { 3822 case AF_INET: 3823 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3824 return -1; 3825 break; 3826 #ifdef INET6 3827 case AF_INET6: 3828 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3829 return -1; 3830 break; 3831 #endif 3832 default: 3833 printf("key_checksalen: unexpected sa_family %d\n", 3834 saddr->sa.sa_family); 3835 return -1; 3836 break; 3837 } 3838 return 0; 3839 } 3840 3841 3842 /* 3843 * set data into sadb_msg. 3844 */ 3845 static struct mbuf * 3846 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3847 u_int32_t seq, pid_t pid, u_int16_t reserved) 3848 { 3849 struct mbuf *m; 3850 struct sadb_msg *p; 3851 int len; 3852 3853 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3854 if (len > MCLBYTES) 3855 return NULL; 3856 MGETHDR(m, M_DONTWAIT, MT_DATA); 3857 if (m && len > MHLEN) { 3858 MCLGET(m, M_DONTWAIT); 3859 if ((m->m_flags & M_EXT) == 0) { 3860 m_freem(m); 3861 m = NULL; 3862 } 3863 } 3864 if (!m) 3865 return NULL; 3866 m->m_pkthdr.len = m->m_len = len; 3867 m->m_next = NULL; 3868 3869 p = mtod(m, struct sadb_msg *); 3870 3871 memset(p, 0, len); 3872 p->sadb_msg_version = PF_KEY_V2; 3873 p->sadb_msg_type = type; 3874 p->sadb_msg_errno = 0; 3875 p->sadb_msg_satype = satype; 3876 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3877 p->sadb_msg_reserved = reserved; 3878 p->sadb_msg_seq = seq; 3879 p->sadb_msg_pid = (u_int32_t)pid; 3880 3881 return m; 3882 } 3883 3884 /* 3885 * copy secasvar data into sadb_address. 3886 */ 3887 static struct mbuf * 3888 key_setsadbsa(struct secasvar *sav) 3889 { 3890 struct mbuf *m; 3891 struct sadb_sa *p; 3892 int len; 3893 3894 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3895 m = key_alloc_mbuf(len); 3896 if (!m || m->m_next) { /*XXX*/ 3897 if (m) 3898 m_freem(m); 3899 return NULL; 3900 } 3901 3902 p = mtod(m, struct sadb_sa *); 3903 3904 memset(p, 0, len); 3905 p->sadb_sa_len = PFKEY_UNIT64(len); 3906 p->sadb_sa_exttype = SADB_EXT_SA; 3907 p->sadb_sa_spi = sav->spi; 3908 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3909 p->sadb_sa_state = sav->state; 3910 p->sadb_sa_auth = sav->alg_auth; 3911 p->sadb_sa_encrypt = sav->alg_enc; 3912 p->sadb_sa_flags = sav->flags; 3913 3914 return m; 3915 } 3916 3917 /* 3918 * set data into sadb_address. 3919 */ 3920 static struct mbuf * 3921 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3922 u_int8_t prefixlen, u_int16_t ul_proto) 3923 { 3924 struct mbuf *m; 3925 struct sadb_address *p; 3926 size_t len; 3927 3928 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3929 PFKEY_ALIGN8(saddr->sa_len); 3930 m = key_alloc_mbuf(len); 3931 if (!m || m->m_next) { /*XXX*/ 3932 if (m) 3933 m_freem(m); 3934 return NULL; 3935 } 3936 3937 p = mtod(m, struct sadb_address *); 3938 3939 memset(p, 0, len); 3940 p->sadb_address_len = PFKEY_UNIT64(len); 3941 p->sadb_address_exttype = exttype; 3942 p->sadb_address_proto = ul_proto; 3943 if (prefixlen == FULLMASK) { 3944 switch (saddr->sa_family) { 3945 case AF_INET: 3946 prefixlen = sizeof(struct in_addr) << 3; 3947 break; 3948 case AF_INET6: 3949 prefixlen = sizeof(struct in6_addr) << 3; 3950 break; 3951 default: 3952 ; /*XXX*/ 3953 } 3954 } 3955 p->sadb_address_prefixlen = prefixlen; 3956 p->sadb_address_reserved = 0; 3957 3958 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3959 saddr, saddr->sa_len); 3960 3961 return m; 3962 } 3963 3964 #if 0 3965 /* 3966 * set data into sadb_ident. 3967 */ 3968 static struct mbuf * 3969 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3970 void *string, int stringlen, u_int64_t id) 3971 { 3972 struct mbuf *m; 3973 struct sadb_ident *p; 3974 size_t len; 3975 3976 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3977 m = key_alloc_mbuf(len); 3978 if (!m || m->m_next) { /*XXX*/ 3979 if (m) 3980 m_freem(m); 3981 return NULL; 3982 } 3983 3984 p = mtod(m, struct sadb_ident *); 3985 3986 memset(p, 0, len); 3987 p->sadb_ident_len = PFKEY_UNIT64(len); 3988 p->sadb_ident_exttype = exttype; 3989 p->sadb_ident_type = idtype; 3990 p->sadb_ident_reserved = 0; 3991 p->sadb_ident_id = id; 3992 3993 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3994 string, stringlen); 3995 3996 return m; 3997 } 3998 #endif 3999 4000 /* 4001 * set data into sadb_x_sa2. 4002 */ 4003 static struct mbuf * 4004 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4005 { 4006 struct mbuf *m; 4007 struct sadb_x_sa2 *p; 4008 size_t len; 4009 4010 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4011 m = key_alloc_mbuf(len); 4012 if (!m || m->m_next) { /*XXX*/ 4013 if (m) 4014 m_freem(m); 4015 return NULL; 4016 } 4017 4018 p = mtod(m, struct sadb_x_sa2 *); 4019 4020 memset(p, 0, len); 4021 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4022 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4023 p->sadb_x_sa2_mode = mode; 4024 p->sadb_x_sa2_reserved1 = 0; 4025 p->sadb_x_sa2_reserved2 = 0; 4026 p->sadb_x_sa2_sequence = seq; 4027 p->sadb_x_sa2_reqid = reqid; 4028 4029 return m; 4030 } 4031 4032 /* 4033 * set data into sadb_x_policy 4034 */ 4035 static struct mbuf * 4036 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4037 { 4038 struct mbuf *m; 4039 struct sadb_x_policy *p; 4040 size_t len; 4041 4042 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4043 m = key_alloc_mbuf(len); 4044 if (!m || m->m_next) { /*XXX*/ 4045 if (m) 4046 m_freem(m); 4047 return NULL; 4048 } 4049 4050 p = mtod(m, struct sadb_x_policy *); 4051 4052 memset(p, 0, len); 4053 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4054 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4055 p->sadb_x_policy_type = type; 4056 p->sadb_x_policy_dir = dir; 4057 p->sadb_x_policy_id = id; 4058 4059 return m; 4060 } 4061 4062 /* %%% utilities */ 4063 /* 4064 * copy a buffer into the new buffer allocated. 4065 */ 4066 static void * 4067 key_newbuf(const void *src, u_int len) 4068 { 4069 void *new; 4070 4071 KMALLOC(new, void *, len); 4072 if (new == NULL) { 4073 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4074 return NULL; 4075 } 4076 memcpy(new, src, len); 4077 4078 return new; 4079 } 4080 4081 /* compare my own address 4082 * OUT: 1: true, i.e. my address. 4083 * 0: false 4084 */ 4085 int 4086 key_ismyaddr(const struct sockaddr *sa) 4087 { 4088 #ifdef INET 4089 const struct sockaddr_in *sin; 4090 const struct in_ifaddr *ia; 4091 #endif 4092 4093 /* sanity check */ 4094 if (sa == NULL) 4095 panic("key_ismyaddr: NULL pointer is passed"); 4096 4097 switch (sa->sa_family) { 4098 #ifdef INET 4099 case AF_INET: 4100 sin = (const struct sockaddr_in *)sa; 4101 for (ia = in_ifaddrhead.tqh_first; ia; 4102 ia = ia->ia_link.tqe_next) 4103 { 4104 if (sin->sin_family == ia->ia_addr.sin_family && 4105 sin->sin_len == ia->ia_addr.sin_len && 4106 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4107 { 4108 return 1; 4109 } 4110 } 4111 break; 4112 #endif 4113 #ifdef INET6 4114 case AF_INET6: 4115 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4116 #endif 4117 } 4118 4119 return 0; 4120 } 4121 4122 #ifdef INET6 4123 /* 4124 * compare my own address for IPv6. 4125 * 1: ours 4126 * 0: other 4127 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4128 */ 4129 #include <netinet6/in6_var.h> 4130 4131 static int 4132 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4133 { 4134 const struct in6_ifaddr *ia; 4135 const struct in6_multi *in6m; 4136 4137 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4138 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4139 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4140 return 1; 4141 4142 /* 4143 * XXX Multicast 4144 * XXX why do we care about multlicast here while we don't care 4145 * about IPv4 multicast?? 4146 * XXX scope 4147 */ 4148 in6m = NULL; 4149 #ifdef __FreeBSD__ 4150 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4151 #else 4152 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4153 (in6m) != NULL && 4154 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4155 (in6m) = in6m->in6m_entry.le_next) 4156 continue; 4157 #endif 4158 if (in6m) 4159 return 1; 4160 } 4161 4162 /* loopback, just for safety */ 4163 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4164 return 1; 4165 4166 return 0; 4167 } 4168 #endif /*INET6*/ 4169 4170 /* 4171 * compare two secasindex structure. 4172 * flag can specify to compare 2 saidxes. 4173 * compare two secasindex structure without both mode and reqid. 4174 * don't compare port. 4175 * IN: 4176 * saidx0: source, it can be in SAD. 4177 * saidx1: object. 4178 * OUT: 4179 * 1 : equal 4180 * 0 : not equal 4181 */ 4182 static int 4183 key_cmpsaidx( 4184 const struct secasindex *saidx0, 4185 const struct secasindex *saidx1, 4186 int flag) 4187 { 4188 int chkport = 0; 4189 4190 /* sanity */ 4191 if (saidx0 == NULL && saidx1 == NULL) 4192 return 1; 4193 4194 if (saidx0 == NULL || saidx1 == NULL) 4195 return 0; 4196 4197 if (saidx0->proto != saidx1->proto) 4198 return 0; 4199 4200 if (flag == CMP_EXACTLY) { 4201 if (saidx0->mode != saidx1->mode) 4202 return 0; 4203 if (saidx0->reqid != saidx1->reqid) 4204 return 0; 4205 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4206 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4207 return 0; 4208 } else { 4209 4210 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4211 if (flag == CMP_MODE_REQID 4212 ||flag == CMP_REQID) { 4213 /* 4214 * If reqid of SPD is non-zero, unique SA is required. 4215 * The result must be of same reqid in this case. 4216 */ 4217 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4218 return 0; 4219 } 4220 4221 if (flag == CMP_MODE_REQID) { 4222 if (saidx0->mode != IPSEC_MODE_ANY 4223 && saidx0->mode != saidx1->mode) 4224 return 0; 4225 } 4226 4227 /* 4228 * If NAT-T is enabled, check ports for tunnel mode. 4229 * Don't do it for transport mode, as there is no 4230 * port information available in the SP. 4231 * Also don't check ports if they are set to zero 4232 * in the SPD: This means we have a non-generated 4233 * SPD which can't know UDP ports. 4234 */ 4235 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4236 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4237 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4238 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4239 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4240 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4241 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4242 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4243 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4244 chkport = 1; 4245 4246 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4247 return 0; 4248 } 4249 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4250 return 0; 4251 } 4252 } 4253 4254 return 1; 4255 } 4256 4257 /* 4258 * compare two secindex structure exactly. 4259 * IN: 4260 * spidx0: source, it is often in SPD. 4261 * spidx1: object, it is often from PFKEY message. 4262 * OUT: 4263 * 1 : equal 4264 * 0 : not equal 4265 */ 4266 int 4267 key_cmpspidx_exactly( 4268 const struct secpolicyindex *spidx0, 4269 const struct secpolicyindex *spidx1) 4270 { 4271 /* sanity */ 4272 if (spidx0 == NULL && spidx1 == NULL) 4273 return 1; 4274 4275 if (spidx0 == NULL || spidx1 == NULL) 4276 return 0; 4277 4278 if (spidx0->prefs != spidx1->prefs 4279 || spidx0->prefd != spidx1->prefd 4280 || spidx0->ul_proto != spidx1->ul_proto) 4281 return 0; 4282 4283 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4284 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4285 } 4286 4287 /* 4288 * compare two secindex structure with mask. 4289 * IN: 4290 * spidx0: source, it is often in SPD. 4291 * spidx1: object, it is often from IP header. 4292 * OUT: 4293 * 1 : equal 4294 * 0 : not equal 4295 */ 4296 int 4297 key_cmpspidx_withmask( 4298 const struct secpolicyindex *spidx0, 4299 const struct secpolicyindex *spidx1) 4300 { 4301 /* sanity */ 4302 if (spidx0 == NULL && spidx1 == NULL) 4303 return 1; 4304 4305 if (spidx0 == NULL || spidx1 == NULL) 4306 return 0; 4307 4308 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4309 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4310 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4311 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4312 return 0; 4313 4314 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4315 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4316 && spidx0->ul_proto != spidx1->ul_proto) 4317 return 0; 4318 4319 switch (spidx0->src.sa.sa_family) { 4320 case AF_INET: 4321 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4322 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4323 return 0; 4324 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4325 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4326 return 0; 4327 break; 4328 case AF_INET6: 4329 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4330 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4331 return 0; 4332 /* 4333 * scope_id check. if sin6_scope_id is 0, we regard it 4334 * as a wildcard scope, which matches any scope zone ID. 4335 */ 4336 if (spidx0->src.sin6.sin6_scope_id && 4337 spidx1->src.sin6.sin6_scope_id && 4338 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4339 return 0; 4340 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4341 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4342 return 0; 4343 break; 4344 default: 4345 /* XXX */ 4346 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4347 return 0; 4348 break; 4349 } 4350 4351 switch (spidx0->dst.sa.sa_family) { 4352 case AF_INET: 4353 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4354 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4355 return 0; 4356 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4357 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4358 return 0; 4359 break; 4360 case AF_INET6: 4361 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4362 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4363 return 0; 4364 /* 4365 * scope_id check. if sin6_scope_id is 0, we regard it 4366 * as a wildcard scope, which matches any scope zone ID. 4367 */ 4368 if (spidx0->src.sin6.sin6_scope_id && 4369 spidx1->src.sin6.sin6_scope_id && 4370 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4371 return 0; 4372 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4373 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4374 return 0; 4375 break; 4376 default: 4377 /* XXX */ 4378 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4379 return 0; 4380 break; 4381 } 4382 4383 /* XXX Do we check other field ? e.g. flowinfo */ 4384 4385 return 1; 4386 } 4387 4388 /* returns 0 on match */ 4389 static int 4390 key_sockaddrcmp( 4391 const struct sockaddr *sa1, 4392 const struct sockaddr *sa2, 4393 int port) 4394 { 4395 #ifdef satosin 4396 #undef satosin 4397 #endif 4398 #define satosin(s) ((const struct sockaddr_in *)s) 4399 #ifdef satosin6 4400 #undef satosin6 4401 #endif 4402 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4403 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4404 return 1; 4405 4406 switch (sa1->sa_family) { 4407 case AF_INET: 4408 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4409 return 1; 4410 if (satosin(sa1)->sin_addr.s_addr != 4411 satosin(sa2)->sin_addr.s_addr) { 4412 return 1; 4413 } 4414 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4415 return 1; 4416 break; 4417 case AF_INET6: 4418 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4419 return 1; /*EINVAL*/ 4420 if (satosin6(sa1)->sin6_scope_id != 4421 satosin6(sa2)->sin6_scope_id) { 4422 return 1; 4423 } 4424 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4425 &satosin6(sa2)->sin6_addr)) { 4426 return 1; 4427 } 4428 if (port && 4429 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4430 return 1; 4431 } 4432 break; 4433 default: 4434 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4435 return 1; 4436 break; 4437 } 4438 4439 return 0; 4440 #undef satosin 4441 #undef satosin6 4442 } 4443 4444 /* 4445 * compare two buffers with mask. 4446 * IN: 4447 * addr1: source 4448 * addr2: object 4449 * bits: Number of bits to compare 4450 * OUT: 4451 * 1 : equal 4452 * 0 : not equal 4453 */ 4454 static int 4455 key_bbcmp(const void *a1, const void *a2, u_int bits) 4456 { 4457 const unsigned char *p1 = a1; 4458 const unsigned char *p2 = a2; 4459 4460 /* XXX: This could be considerably faster if we compare a word 4461 * at a time, but it is complicated on LSB Endian machines */ 4462 4463 /* Handle null pointers */ 4464 if (p1 == NULL || p2 == NULL) 4465 return (p1 == p2); 4466 4467 while (bits >= 8) { 4468 if (*p1++ != *p2++) 4469 return 0; 4470 bits -= 8; 4471 } 4472 4473 if (bits > 0) { 4474 u_int8_t mask = ~((1<<(8-bits))-1); 4475 if ((*p1 & mask) != (*p2 & mask)) 4476 return 0; 4477 } 4478 return 1; /* Match! */ 4479 } 4480 4481 /* 4482 * time handler. 4483 * scanning SPD and SAD to check status for each entries, 4484 * and do to remove or to expire. 4485 */ 4486 void 4487 key_timehandler(void* arg) 4488 { 4489 u_int dir; 4490 int s; 4491 time_t now = time_uptime; 4492 4493 s = splsoftnet(); /*called from softclock()*/ 4494 mutex_enter(softnet_lock); 4495 4496 /* SPD */ 4497 { 4498 struct secpolicy *sp, *nextsp; 4499 4500 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4501 for (sp = LIST_FIRST(&sptree[dir]); 4502 sp != NULL; 4503 sp = nextsp) { 4504 4505 nextsp = LIST_NEXT(sp, chain); 4506 4507 if (sp->state == IPSEC_SPSTATE_DEAD) { 4508 key_sp_unlink(sp); /*XXX*/ 4509 4510 /* 'sp' dead; continue transfers to 4511 * 'sp = nextsp' 4512 */ 4513 continue; 4514 } 4515 4516 if (sp->lifetime == 0 && sp->validtime == 0) 4517 continue; 4518 4519 /* the deletion will occur next time */ 4520 if ((sp->lifetime && now - sp->created > sp->lifetime) 4521 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4522 key_sp_dead(sp); 4523 key_spdexpire(sp); 4524 continue; 4525 } 4526 } 4527 } 4528 } 4529 4530 /* SAD */ 4531 { 4532 struct secashead *sah, *nextsah; 4533 struct secasvar *sav, *nextsav; 4534 4535 for (sah = LIST_FIRST(&sahtree); 4536 sah != NULL; 4537 sah = nextsah) { 4538 4539 nextsah = LIST_NEXT(sah, chain); 4540 4541 /* if sah has been dead, then delete it and process next sah. */ 4542 if (sah->state == SADB_SASTATE_DEAD) { 4543 key_delsah(sah); 4544 continue; 4545 } 4546 4547 /* if LARVAL entry doesn't become MATURE, delete it. */ 4548 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4549 sav != NULL; 4550 sav = nextsav) { 4551 4552 nextsav = LIST_NEXT(sav, chain); 4553 4554 if (now - sav->created > key_larval_lifetime) { 4555 KEY_FREESAV(&sav); 4556 } 4557 } 4558 4559 /* 4560 * check MATURE entry to start to send expire message 4561 * whether or not. 4562 */ 4563 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4564 sav != NULL; 4565 sav = nextsav) { 4566 4567 nextsav = LIST_NEXT(sav, chain); 4568 4569 /* we don't need to check. */ 4570 if (sav->lft_s == NULL) 4571 continue; 4572 4573 /* sanity check */ 4574 if (sav->lft_c == NULL) { 4575 ipseclog((LOG_DEBUG,"key_timehandler: " 4576 "There is no CURRENT time, why?\n")); 4577 continue; 4578 } 4579 4580 /* check SOFT lifetime */ 4581 if (sav->lft_s->sadb_lifetime_addtime != 0 4582 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4583 /* 4584 * check SA to be used whether or not. 4585 * when SA hasn't been used, delete it. 4586 */ 4587 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4588 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4589 KEY_FREESAV(&sav); 4590 } else { 4591 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4592 /* 4593 * XXX If we keep to send expire 4594 * message in the status of 4595 * DYING. Do remove below code. 4596 */ 4597 key_expire(sav); 4598 } 4599 } 4600 /* check SOFT lifetime by bytes */ 4601 /* 4602 * XXX I don't know the way to delete this SA 4603 * when new SA is installed. Caution when it's 4604 * installed too big lifetime by time. 4605 */ 4606 else if (sav->lft_s->sadb_lifetime_bytes != 0 4607 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4608 4609 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4610 /* 4611 * XXX If we keep to send expire 4612 * message in the status of 4613 * DYING. Do remove below code. 4614 */ 4615 key_expire(sav); 4616 } 4617 } 4618 4619 /* check DYING entry to change status to DEAD. */ 4620 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4621 sav != NULL; 4622 sav = nextsav) { 4623 4624 nextsav = LIST_NEXT(sav, chain); 4625 4626 /* we don't need to check. */ 4627 if (sav->lft_h == NULL) 4628 continue; 4629 4630 /* sanity check */ 4631 if (sav->lft_c == NULL) { 4632 ipseclog((LOG_DEBUG, "key_timehandler: " 4633 "There is no CURRENT time, why?\n")); 4634 continue; 4635 } 4636 4637 if (sav->lft_h->sadb_lifetime_addtime != 0 4638 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4639 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4640 KEY_FREESAV(&sav); 4641 } 4642 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4643 else if (sav->lft_s != NULL 4644 && sav->lft_s->sadb_lifetime_addtime != 0 4645 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4646 /* 4647 * XXX: should be checked to be 4648 * installed the valid SA. 4649 */ 4650 4651 /* 4652 * If there is no SA then sending 4653 * expire message. 4654 */ 4655 key_expire(sav); 4656 } 4657 #endif 4658 /* check HARD lifetime by bytes */ 4659 else if (sav->lft_h->sadb_lifetime_bytes != 0 4660 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4661 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4662 KEY_FREESAV(&sav); 4663 } 4664 } 4665 4666 /* delete entry in DEAD */ 4667 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4668 sav != NULL; 4669 sav = nextsav) { 4670 4671 nextsav = LIST_NEXT(sav, chain); 4672 4673 /* sanity check */ 4674 if (sav->state != SADB_SASTATE_DEAD) { 4675 ipseclog((LOG_DEBUG, "key_timehandler: " 4676 "invalid sav->state " 4677 "(queue: %d SA: %d): " 4678 "kill it anyway\n", 4679 SADB_SASTATE_DEAD, sav->state)); 4680 } 4681 4682 /* 4683 * do not call key_freesav() here. 4684 * sav should already be freed, and sav->refcnt 4685 * shows other references to sav 4686 * (such as from SPD). 4687 */ 4688 } 4689 } 4690 } 4691 4692 #ifndef IPSEC_NONBLOCK_ACQUIRE 4693 /* ACQ tree */ 4694 { 4695 struct secacq *acq, *nextacq; 4696 4697 for (acq = LIST_FIRST(&acqtree); 4698 acq != NULL; 4699 acq = nextacq) { 4700 4701 nextacq = LIST_NEXT(acq, chain); 4702 4703 if (now - acq->created > key_blockacq_lifetime 4704 && __LIST_CHAINED(acq)) { 4705 LIST_REMOVE(acq, chain); 4706 KFREE(acq); 4707 } 4708 } 4709 } 4710 #endif 4711 4712 /* SP ACQ tree */ 4713 { 4714 struct secspacq *acq, *nextacq; 4715 4716 for (acq = LIST_FIRST(&spacqtree); 4717 acq != NULL; 4718 acq = nextacq) { 4719 4720 nextacq = LIST_NEXT(acq, chain); 4721 4722 if (now - acq->created > key_blockacq_lifetime 4723 && __LIST_CHAINED(acq)) { 4724 LIST_REMOVE(acq, chain); 4725 KFREE(acq); 4726 } 4727 } 4728 } 4729 4730 #ifndef IPSEC_DEBUG2 4731 /* do exchange to tick time !! */ 4732 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4733 #endif /* IPSEC_DEBUG2 */ 4734 4735 mutex_exit(softnet_lock); 4736 splx(s); 4737 return; 4738 } 4739 4740 u_long 4741 key_random(void) 4742 { 4743 u_long value; 4744 4745 key_randomfill(&value, sizeof(value)); 4746 return value; 4747 } 4748 4749 void 4750 key_randomfill(void *p, size_t l) 4751 { 4752 4753 cprng_fast(p, l); 4754 } 4755 4756 /* 4757 * map SADB_SATYPE_* to IPPROTO_*. 4758 * if satype == SADB_SATYPE then satype is mapped to ~0. 4759 * OUT: 4760 * 0: invalid satype. 4761 */ 4762 static u_int16_t 4763 key_satype2proto(u_int8_t satype) 4764 { 4765 switch (satype) { 4766 case SADB_SATYPE_UNSPEC: 4767 return IPSEC_PROTO_ANY; 4768 case SADB_SATYPE_AH: 4769 return IPPROTO_AH; 4770 case SADB_SATYPE_ESP: 4771 return IPPROTO_ESP; 4772 case SADB_X_SATYPE_IPCOMP: 4773 return IPPROTO_IPCOMP; 4774 case SADB_X_SATYPE_TCPSIGNATURE: 4775 return IPPROTO_TCP; 4776 default: 4777 return 0; 4778 } 4779 /* NOTREACHED */ 4780 } 4781 4782 /* 4783 * map IPPROTO_* to SADB_SATYPE_* 4784 * OUT: 4785 * 0: invalid protocol type. 4786 */ 4787 static u_int8_t 4788 key_proto2satype(u_int16_t proto) 4789 { 4790 switch (proto) { 4791 case IPPROTO_AH: 4792 return SADB_SATYPE_AH; 4793 case IPPROTO_ESP: 4794 return SADB_SATYPE_ESP; 4795 case IPPROTO_IPCOMP: 4796 return SADB_X_SATYPE_IPCOMP; 4797 case IPPROTO_TCP: 4798 return SADB_X_SATYPE_TCPSIGNATURE; 4799 default: 4800 return 0; 4801 } 4802 /* NOTREACHED */ 4803 } 4804 4805 static int 4806 key_setsecasidx(int proto, int mode, int reqid, 4807 const struct sadb_address * src, 4808 const struct sadb_address * dst, 4809 struct secasindex * saidx) 4810 { 4811 const union sockaddr_union * src_u = 4812 (const union sockaddr_union *) src; 4813 const union sockaddr_union * dst_u = 4814 (const union sockaddr_union *) dst; 4815 4816 /* sa len safety check */ 4817 if (key_checksalen(src_u) != 0) 4818 return -1; 4819 if (key_checksalen(dst_u) != 0) 4820 return -1; 4821 4822 memset(saidx, 0, sizeof(*saidx)); 4823 saidx->proto = proto; 4824 saidx->mode = mode; 4825 saidx->reqid = reqid; 4826 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4827 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4828 4829 key_porttosaddr(&((saidx)->src),0); 4830 key_porttosaddr(&((saidx)->dst),0); 4831 return 0; 4832 } 4833 4834 /* %%% PF_KEY */ 4835 /* 4836 * SADB_GETSPI processing is to receive 4837 * <base, (SA2), src address, dst address, (SPI range)> 4838 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4839 * tree with the status of LARVAL, and send 4840 * <base, SA(*), address(SD)> 4841 * to the IKMPd. 4842 * 4843 * IN: mhp: pointer to the pointer to each header. 4844 * OUT: NULL if fail. 4845 * other if success, return pointer to the message to send. 4846 */ 4847 static int 4848 key_getspi(struct socket *so, struct mbuf *m, 4849 const struct sadb_msghdr *mhp) 4850 { 4851 struct sadb_address *src0, *dst0; 4852 struct secasindex saidx; 4853 struct secashead *newsah; 4854 struct secasvar *newsav; 4855 u_int8_t proto; 4856 u_int32_t spi; 4857 u_int8_t mode; 4858 u_int16_t reqid; 4859 int error; 4860 4861 /* sanity check */ 4862 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4863 panic("key_getspi: NULL pointer is passed"); 4864 4865 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4866 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4867 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4868 return key_senderror(so, m, EINVAL); 4869 } 4870 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4871 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4872 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4873 return key_senderror(so, m, EINVAL); 4874 } 4875 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4876 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4877 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4878 } else { 4879 mode = IPSEC_MODE_ANY; 4880 reqid = 0; 4881 } 4882 4883 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4884 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4885 4886 /* map satype to proto */ 4887 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4888 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4889 return key_senderror(so, m, EINVAL); 4890 } 4891 4892 4893 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4894 dst0 + 1, &saidx)) != 0) 4895 return key_senderror(so, m, EINVAL); 4896 4897 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4898 return key_senderror(so, m, EINVAL); 4899 4900 /* SPI allocation */ 4901 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4902 &saidx); 4903 if (spi == 0) 4904 return key_senderror(so, m, EINVAL); 4905 4906 /* get a SA index */ 4907 if ((newsah = key_getsah(&saidx)) == NULL) { 4908 /* create a new SA index */ 4909 if ((newsah = key_newsah(&saidx)) == NULL) { 4910 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4911 return key_senderror(so, m, ENOBUFS); 4912 } 4913 } 4914 4915 /* get a new SA */ 4916 /* XXX rewrite */ 4917 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4918 if (newsav == NULL) { 4919 /* XXX don't free new SA index allocated in above. */ 4920 return key_senderror(so, m, error); 4921 } 4922 4923 /* set spi */ 4924 newsav->spi = htonl(spi); 4925 4926 #ifndef IPSEC_NONBLOCK_ACQUIRE 4927 /* delete the entry in acqtree */ 4928 if (mhp->msg->sadb_msg_seq != 0) { 4929 struct secacq *acq; 4930 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4931 /* reset counter in order to deletion by timehandler. */ 4932 acq->created = time_uptime; 4933 acq->count = 0; 4934 } 4935 } 4936 #endif 4937 4938 { 4939 struct mbuf *n, *nn; 4940 struct sadb_sa *m_sa; 4941 struct sadb_msg *newmsg; 4942 int off, len; 4943 4944 /* create new sadb_msg to reply. */ 4945 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4946 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4947 if (len > MCLBYTES) 4948 return key_senderror(so, m, ENOBUFS); 4949 4950 MGETHDR(n, M_DONTWAIT, MT_DATA); 4951 if (len > MHLEN) { 4952 MCLGET(n, M_DONTWAIT); 4953 if ((n->m_flags & M_EXT) == 0) { 4954 m_freem(n); 4955 n = NULL; 4956 } 4957 } 4958 if (!n) 4959 return key_senderror(so, m, ENOBUFS); 4960 4961 n->m_len = len; 4962 n->m_next = NULL; 4963 off = 0; 4964 4965 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4966 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4967 4968 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4969 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4970 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4971 m_sa->sadb_sa_spi = htonl(spi); 4972 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4973 4974 #ifdef DIAGNOSTIC 4975 if (off != len) 4976 panic("length inconsistency in key_getspi"); 4977 #endif 4978 4979 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4980 SADB_EXT_ADDRESS_DST); 4981 if (!n->m_next) { 4982 m_freem(n); 4983 return key_senderror(so, m, ENOBUFS); 4984 } 4985 4986 if (n->m_len < sizeof(struct sadb_msg)) { 4987 n = m_pullup(n, sizeof(struct sadb_msg)); 4988 if (n == NULL) 4989 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4990 } 4991 4992 n->m_pkthdr.len = 0; 4993 for (nn = n; nn; nn = nn->m_next) 4994 n->m_pkthdr.len += nn->m_len; 4995 4996 newmsg = mtod(n, struct sadb_msg *); 4997 newmsg->sadb_msg_seq = newsav->seq; 4998 newmsg->sadb_msg_errno = 0; 4999 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5000 5001 m_freem(m); 5002 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5003 } 5004 } 5005 5006 /* 5007 * allocating new SPI 5008 * called by key_getspi(). 5009 * OUT: 5010 * 0: failure. 5011 * others: success. 5012 */ 5013 static u_int32_t 5014 key_do_getnewspi(const struct sadb_spirange *spirange, 5015 const struct secasindex *saidx) 5016 { 5017 u_int32_t newspi; 5018 u_int32_t spmin, spmax; 5019 int count = key_spi_trycnt; 5020 5021 /* set spi range to allocate */ 5022 if (spirange != NULL) { 5023 spmin = spirange->sadb_spirange_min; 5024 spmax = spirange->sadb_spirange_max; 5025 } else { 5026 spmin = key_spi_minval; 5027 spmax = key_spi_maxval; 5028 } 5029 /* IPCOMP needs 2-byte SPI */ 5030 if (saidx->proto == IPPROTO_IPCOMP) { 5031 u_int32_t t; 5032 if (spmin >= 0x10000) 5033 spmin = 0xffff; 5034 if (spmax >= 0x10000) 5035 spmax = 0xffff; 5036 if (spmin > spmax) { 5037 t = spmin; spmin = spmax; spmax = t; 5038 } 5039 } 5040 5041 if (spmin == spmax) { 5042 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5043 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5044 return 0; 5045 } 5046 5047 count--; /* taking one cost. */ 5048 newspi = spmin; 5049 5050 } else { 5051 5052 /* init SPI */ 5053 newspi = 0; 5054 5055 /* when requesting to allocate spi ranged */ 5056 while (count--) { 5057 /* generate pseudo-random SPI value ranged. */ 5058 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5059 5060 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5061 break; 5062 } 5063 5064 if (count == 0 || newspi == 0) { 5065 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5066 return 0; 5067 } 5068 } 5069 5070 /* statistics */ 5071 keystat.getspi_count = 5072 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5073 5074 return newspi; 5075 } 5076 5077 static int 5078 key_handle_natt_info(struct secasvar *sav, 5079 const struct sadb_msghdr *mhp) 5080 { 5081 5082 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5083 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5084 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5085 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5086 5087 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5088 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5089 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5090 struct sadb_x_nat_t_type *type; 5091 struct sadb_x_nat_t_port *sport; 5092 struct sadb_x_nat_t_port *dport; 5093 struct sadb_address *iaddr, *raddr; 5094 struct sadb_x_nat_t_frag *frag; 5095 5096 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5097 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5098 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5099 ipseclog((LOG_DEBUG, "key_update: " 5100 "invalid message.\n")); 5101 return -1; 5102 } 5103 5104 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 5105 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 5106 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5107 return -1; 5108 } 5109 5110 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 5111 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 5112 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5113 return -1; 5114 } 5115 5116 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5117 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5118 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5119 return -1; 5120 } 5121 5122 type = (struct sadb_x_nat_t_type *) 5123 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5124 sport = (struct sadb_x_nat_t_port *) 5125 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5126 dport = (struct sadb_x_nat_t_port *) 5127 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5128 iaddr = (struct sadb_address *) 5129 mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5130 raddr = (struct sadb_address *) 5131 mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5132 frag = (struct sadb_x_nat_t_frag *) 5133 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5134 5135 ipseclog((LOG_DEBUG, 5136 "key_update: type %d, sport = %d, dport = %d\n", 5137 type->sadb_x_nat_t_type_type, 5138 sport->sadb_x_nat_t_port_port, 5139 dport->sadb_x_nat_t_port_port)); 5140 5141 if (type) 5142 sav->natt_type = type->sadb_x_nat_t_type_type; 5143 if (sport) 5144 key_porttosaddr(&sav->sah->saidx.src, 5145 sport->sadb_x_nat_t_port_port); 5146 if (dport) 5147 key_porttosaddr(&sav->sah->saidx.dst, 5148 dport->sadb_x_nat_t_port_port); 5149 if (frag) 5150 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5151 else 5152 sav->esp_frag = IP_MAXPACKET; 5153 } 5154 5155 return 0; 5156 } 5157 5158 /* Just update the IPSEC_NAT_T ports if present */ 5159 static int 5160 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5161 const struct sadb_msghdr *mhp) 5162 { 5163 5164 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5165 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5166 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5167 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5168 5169 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5170 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5171 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5172 struct sadb_x_nat_t_type *type; 5173 struct sadb_x_nat_t_port *sport; 5174 struct sadb_x_nat_t_port *dport; 5175 5176 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5177 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5178 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5179 ipseclog((LOG_DEBUG, "key_update: " 5180 "invalid message.\n")); 5181 return -1; 5182 } 5183 5184 sport = (struct sadb_x_nat_t_port *) 5185 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5186 dport = (struct sadb_x_nat_t_port *) 5187 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5188 5189 if (sport) 5190 key_porttosaddr(src, 5191 sport->sadb_x_nat_t_port_port); 5192 if (dport) 5193 key_porttosaddr(dst, 5194 dport->sadb_x_nat_t_port_port); 5195 } 5196 5197 return 0; 5198 } 5199 5200 5201 /* 5202 * SADB_UPDATE processing 5203 * receive 5204 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5205 * key(AE), (identity(SD),) (sensitivity)> 5206 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5207 * and send 5208 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5209 * (identity(SD),) (sensitivity)> 5210 * to the ikmpd. 5211 * 5212 * m will always be freed. 5213 */ 5214 static int 5215 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5216 { 5217 struct sadb_sa *sa0; 5218 struct sadb_address *src0, *dst0; 5219 struct secasindex saidx; 5220 struct secashead *sah; 5221 struct secasvar *sav; 5222 u_int16_t proto; 5223 u_int8_t mode; 5224 u_int16_t reqid; 5225 int error; 5226 5227 /* sanity check */ 5228 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5229 panic("key_update: NULL pointer is passed"); 5230 5231 /* map satype to proto */ 5232 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5233 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5234 return key_senderror(so, m, EINVAL); 5235 } 5236 5237 if (mhp->ext[SADB_EXT_SA] == NULL || 5238 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5239 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5240 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5241 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5242 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5243 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5244 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5245 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5246 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5247 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5248 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5249 return key_senderror(so, m, EINVAL); 5250 } 5251 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5252 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5253 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5254 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5255 return key_senderror(so, m, EINVAL); 5256 } 5257 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5258 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5259 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5260 } else { 5261 mode = IPSEC_MODE_ANY; 5262 reqid = 0; 5263 } 5264 /* XXX boundary checking for other extensions */ 5265 5266 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5267 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5268 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5269 5270 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5271 dst0 + 1, &saidx)) != 0) 5272 return key_senderror(so, m, EINVAL); 5273 5274 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5275 return key_senderror(so, m, EINVAL); 5276 5277 /* get a SA header */ 5278 if ((sah = key_getsah(&saidx)) == NULL) { 5279 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5280 return key_senderror(so, m, ENOENT); 5281 } 5282 5283 /* set spidx if there */ 5284 /* XXX rewrite */ 5285 error = key_setident(sah, m, mhp); 5286 if (error) 5287 return key_senderror(so, m, error); 5288 5289 /* find a SA with sequence number. */ 5290 #ifdef IPSEC_DOSEQCHECK 5291 if (mhp->msg->sadb_msg_seq != 0 5292 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5293 ipseclog((LOG_DEBUG, 5294 "key_update: no larval SA with sequence %u exists.\n", 5295 mhp->msg->sadb_msg_seq)); 5296 return key_senderror(so, m, ENOENT); 5297 } 5298 #else 5299 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5300 ipseclog((LOG_DEBUG, 5301 "key_update: no such a SA found (spi:%u)\n", 5302 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5303 return key_senderror(so, m, EINVAL); 5304 } 5305 #endif 5306 5307 /* validity check */ 5308 if (sav->sah->saidx.proto != proto) { 5309 ipseclog((LOG_DEBUG, 5310 "key_update: protocol mismatched (DB=%u param=%u)\n", 5311 sav->sah->saidx.proto, proto)); 5312 return key_senderror(so, m, EINVAL); 5313 } 5314 #ifdef IPSEC_DOSEQCHECK 5315 if (sav->spi != sa0->sadb_sa_spi) { 5316 ipseclog((LOG_DEBUG, 5317 "key_update: SPI mismatched (DB:%u param:%u)\n", 5318 (u_int32_t)ntohl(sav->spi), 5319 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5320 return key_senderror(so, m, EINVAL); 5321 } 5322 #endif 5323 if (sav->pid != mhp->msg->sadb_msg_pid) { 5324 ipseclog((LOG_DEBUG, 5325 "key_update: pid mismatched (DB:%u param:%u)\n", 5326 sav->pid, mhp->msg->sadb_msg_pid)); 5327 return key_senderror(so, m, EINVAL); 5328 } 5329 5330 /* copy sav values */ 5331 error = key_setsaval(sav, m, mhp); 5332 if (error) { 5333 KEY_FREESAV(&sav); 5334 return key_senderror(so, m, error); 5335 } 5336 5337 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5338 return key_senderror(so, m, EINVAL); 5339 5340 /* check SA values to be mature. */ 5341 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5342 KEY_FREESAV(&sav); 5343 return key_senderror(so, m, 0); 5344 } 5345 5346 { 5347 struct mbuf *n; 5348 5349 /* set msg buf from mhp */ 5350 n = key_getmsgbuf_x1(m, mhp); 5351 if (n == NULL) { 5352 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5353 return key_senderror(so, m, ENOBUFS); 5354 } 5355 5356 m_freem(m); 5357 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5358 } 5359 } 5360 5361 /* 5362 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5363 * only called by key_update(). 5364 * OUT: 5365 * NULL : not found 5366 * others : found, pointer to a SA. 5367 */ 5368 #ifdef IPSEC_DOSEQCHECK 5369 static struct secasvar * 5370 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5371 { 5372 struct secasvar *sav; 5373 u_int state; 5374 5375 state = SADB_SASTATE_LARVAL; 5376 5377 /* search SAD with sequence number ? */ 5378 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5379 5380 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5381 5382 if (sav->seq == seq) { 5383 SA_ADDREF(sav); 5384 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5385 printf("DP key_getsavbyseq cause " 5386 "refcnt++:%d SA:%p\n", 5387 sav->refcnt, sav)); 5388 return sav; 5389 } 5390 } 5391 5392 return NULL; 5393 } 5394 #endif 5395 5396 /* 5397 * SADB_ADD processing 5398 * add an entry to SA database, when received 5399 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5400 * key(AE), (identity(SD),) (sensitivity)> 5401 * from the ikmpd, 5402 * and send 5403 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5404 * (identity(SD),) (sensitivity)> 5405 * to the ikmpd. 5406 * 5407 * IGNORE identity and sensitivity messages. 5408 * 5409 * m will always be freed. 5410 */ 5411 static int 5412 key_add(struct socket *so, struct mbuf *m, 5413 const struct sadb_msghdr *mhp) 5414 { 5415 struct sadb_sa *sa0; 5416 struct sadb_address *src0, *dst0; 5417 struct secasindex saidx; 5418 struct secashead *newsah; 5419 struct secasvar *newsav; 5420 u_int16_t proto; 5421 u_int8_t mode; 5422 u_int16_t reqid; 5423 int error; 5424 5425 /* sanity check */ 5426 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5427 panic("key_add: NULL pointer is passed"); 5428 5429 /* map satype to proto */ 5430 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5431 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5432 return key_senderror(so, m, EINVAL); 5433 } 5434 5435 if (mhp->ext[SADB_EXT_SA] == NULL || 5436 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5437 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5438 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5439 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5440 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5441 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5442 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5443 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5444 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5445 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5446 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5447 return key_senderror(so, m, EINVAL); 5448 } 5449 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5450 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5451 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5452 /* XXX need more */ 5453 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5454 return key_senderror(so, m, EINVAL); 5455 } 5456 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5457 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5458 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5459 } else { 5460 mode = IPSEC_MODE_ANY; 5461 reqid = 0; 5462 } 5463 5464 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5465 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5466 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5467 5468 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5469 dst0 + 1, &saidx)) != 0) 5470 return key_senderror(so, m, EINVAL); 5471 5472 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5473 return key_senderror(so, m, EINVAL); 5474 5475 /* get a SA header */ 5476 if ((newsah = key_getsah(&saidx)) == NULL) { 5477 /* create a new SA header */ 5478 if ((newsah = key_newsah(&saidx)) == NULL) { 5479 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5480 return key_senderror(so, m, ENOBUFS); 5481 } 5482 } 5483 5484 /* set spidx if there */ 5485 /* XXX rewrite */ 5486 error = key_setident(newsah, m, mhp); 5487 if (error) { 5488 return key_senderror(so, m, error); 5489 } 5490 5491 /* create new SA entry. */ 5492 /* We can create new SA only if SPI is differenct. */ 5493 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5494 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5495 return key_senderror(so, m, EEXIST); 5496 } 5497 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5498 if (newsav == NULL) { 5499 return key_senderror(so, m, error); 5500 } 5501 5502 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5503 return key_senderror(so, m, EINVAL); 5504 5505 /* check SA values to be mature. */ 5506 if ((error = key_mature(newsav)) != 0) { 5507 KEY_FREESAV(&newsav); 5508 return key_senderror(so, m, error); 5509 } 5510 5511 /* 5512 * don't call key_freesav() here, as we would like to keep the SA 5513 * in the database on success. 5514 */ 5515 5516 { 5517 struct mbuf *n; 5518 5519 /* set msg buf from mhp */ 5520 n = key_getmsgbuf_x1(m, mhp); 5521 if (n == NULL) { 5522 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5523 return key_senderror(so, m, ENOBUFS); 5524 } 5525 5526 m_freem(m); 5527 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5528 } 5529 } 5530 5531 /* m is retained */ 5532 static int 5533 key_setident(struct secashead *sah, struct mbuf *m, 5534 const struct sadb_msghdr *mhp) 5535 { 5536 const struct sadb_ident *idsrc, *iddst; 5537 int idsrclen, iddstlen; 5538 5539 /* sanity check */ 5540 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5541 panic("key_setident: NULL pointer is passed"); 5542 5543 /* don't make buffer if not there */ 5544 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5545 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5546 sah->idents = NULL; 5547 sah->identd = NULL; 5548 return 0; 5549 } 5550 5551 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5552 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5553 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5554 return EINVAL; 5555 } 5556 5557 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5558 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5559 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5560 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5561 5562 /* validity check */ 5563 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5564 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5565 return EINVAL; 5566 } 5567 5568 switch (idsrc->sadb_ident_type) { 5569 case SADB_IDENTTYPE_PREFIX: 5570 case SADB_IDENTTYPE_FQDN: 5571 case SADB_IDENTTYPE_USERFQDN: 5572 default: 5573 /* XXX do nothing */ 5574 sah->idents = NULL; 5575 sah->identd = NULL; 5576 return 0; 5577 } 5578 5579 /* make structure */ 5580 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5581 if (sah->idents == NULL) { 5582 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5583 return ENOBUFS; 5584 } 5585 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5586 if (sah->identd == NULL) { 5587 KFREE(sah->idents); 5588 sah->idents = NULL; 5589 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5590 return ENOBUFS; 5591 } 5592 memcpy(sah->idents, idsrc, idsrclen); 5593 memcpy(sah->identd, iddst, iddstlen); 5594 5595 return 0; 5596 } 5597 5598 /* 5599 * m will not be freed on return. 5600 * it is caller's responsibility to free the result. 5601 */ 5602 static struct mbuf * 5603 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5604 { 5605 struct mbuf *n; 5606 5607 /* sanity check */ 5608 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5609 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5610 5611 /* create new sadb_msg to reply. */ 5612 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5613 SADB_EXT_SA, SADB_X_EXT_SA2, 5614 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5615 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5616 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5617 if (!n) 5618 return NULL; 5619 5620 if (n->m_len < sizeof(struct sadb_msg)) { 5621 n = m_pullup(n, sizeof(struct sadb_msg)); 5622 if (n == NULL) 5623 return NULL; 5624 } 5625 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5626 mtod(n, struct sadb_msg *)->sadb_msg_len = 5627 PFKEY_UNIT64(n->m_pkthdr.len); 5628 5629 return n; 5630 } 5631 5632 static int key_delete_all (struct socket *, struct mbuf *, 5633 const struct sadb_msghdr *, u_int16_t); 5634 5635 /* 5636 * SADB_DELETE processing 5637 * receive 5638 * <base, SA(*), address(SD)> 5639 * from the ikmpd, and set SADB_SASTATE_DEAD, 5640 * and send, 5641 * <base, SA(*), address(SD)> 5642 * to the ikmpd. 5643 * 5644 * m will always be freed. 5645 */ 5646 static int 5647 key_delete(struct socket *so, struct mbuf *m, 5648 const struct sadb_msghdr *mhp) 5649 { 5650 struct sadb_sa *sa0; 5651 struct sadb_address *src0, *dst0; 5652 struct secasindex saidx; 5653 struct secashead *sah; 5654 struct secasvar *sav = NULL; 5655 u_int16_t proto; 5656 int error; 5657 5658 /* sanity check */ 5659 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5660 panic("key_delete: NULL pointer is passed"); 5661 5662 /* map satype to proto */ 5663 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5664 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5665 return key_senderror(so, m, EINVAL); 5666 } 5667 5668 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5669 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5670 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5671 return key_senderror(so, m, EINVAL); 5672 } 5673 5674 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5675 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5676 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5677 return key_senderror(so, m, EINVAL); 5678 } 5679 5680 if (mhp->ext[SADB_EXT_SA] == NULL) { 5681 /* 5682 * Caller wants us to delete all non-LARVAL SAs 5683 * that match the src/dst. This is used during 5684 * IKE INITIAL-CONTACT. 5685 */ 5686 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5687 return key_delete_all(so, m, mhp, proto); 5688 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5689 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5690 return key_senderror(so, m, EINVAL); 5691 } 5692 5693 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5694 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5695 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5696 5697 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5698 dst0 + 1, &saidx)) != 0) 5699 return key_senderror(so, m, EINVAL); 5700 5701 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5702 return key_senderror(so, m, EINVAL); 5703 5704 /* get a SA header */ 5705 LIST_FOREACH(sah, &sahtree, chain) { 5706 if (sah->state == SADB_SASTATE_DEAD) 5707 continue; 5708 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5709 continue; 5710 5711 /* get a SA with SPI. */ 5712 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5713 if (sav) 5714 break; 5715 } 5716 if (sah == NULL) { 5717 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5718 return key_senderror(so, m, ENOENT); 5719 } 5720 5721 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5722 KEY_FREESAV(&sav); 5723 5724 { 5725 struct mbuf *n; 5726 struct sadb_msg *newmsg; 5727 5728 /* create new sadb_msg to reply. */ 5729 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5730 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5731 if (!n) 5732 return key_senderror(so, m, ENOBUFS); 5733 5734 if (n->m_len < sizeof(struct sadb_msg)) { 5735 n = m_pullup(n, sizeof(struct sadb_msg)); 5736 if (n == NULL) 5737 return key_senderror(so, m, ENOBUFS); 5738 } 5739 newmsg = mtod(n, struct sadb_msg *); 5740 newmsg->sadb_msg_errno = 0; 5741 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5742 5743 m_freem(m); 5744 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5745 } 5746 } 5747 5748 /* 5749 * delete all SAs for src/dst. Called from key_delete(). 5750 */ 5751 static int 5752 key_delete_all(struct socket *so, struct mbuf *m, 5753 const struct sadb_msghdr *mhp, u_int16_t proto) 5754 { 5755 struct sadb_address *src0, *dst0; 5756 struct secasindex saidx; 5757 struct secashead *sah; 5758 struct secasvar *sav, *nextsav; 5759 u_int stateidx, state; 5760 int error; 5761 5762 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5763 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5764 5765 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5766 dst0 + 1, &saidx)) != 0) 5767 return key_senderror(so, m, EINVAL); 5768 5769 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5770 return key_senderror(so, m, EINVAL); 5771 5772 LIST_FOREACH(sah, &sahtree, chain) { 5773 if (sah->state == SADB_SASTATE_DEAD) 5774 continue; 5775 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5776 continue; 5777 5778 /* Delete all non-LARVAL SAs. */ 5779 for (stateidx = 0; 5780 stateidx < _ARRAYLEN(saorder_state_alive); 5781 stateidx++) { 5782 state = saorder_state_alive[stateidx]; 5783 if (state == SADB_SASTATE_LARVAL) 5784 continue; 5785 for (sav = LIST_FIRST(&sah->savtree[state]); 5786 sav != NULL; sav = nextsav) { 5787 nextsav = LIST_NEXT(sav, chain); 5788 /* sanity check */ 5789 if (sav->state != state) { 5790 ipseclog((LOG_DEBUG, "key_delete_all: " 5791 "invalid sav->state " 5792 "(queue: %d SA: %d)\n", 5793 state, sav->state)); 5794 continue; 5795 } 5796 5797 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5798 KEY_FREESAV(&sav); 5799 } 5800 } 5801 } 5802 { 5803 struct mbuf *n; 5804 struct sadb_msg *newmsg; 5805 5806 /* create new sadb_msg to reply. */ 5807 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5808 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5809 if (!n) 5810 return key_senderror(so, m, ENOBUFS); 5811 5812 if (n->m_len < sizeof(struct sadb_msg)) { 5813 n = m_pullup(n, sizeof(struct sadb_msg)); 5814 if (n == NULL) 5815 return key_senderror(so, m, ENOBUFS); 5816 } 5817 newmsg = mtod(n, struct sadb_msg *); 5818 newmsg->sadb_msg_errno = 0; 5819 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5820 5821 m_freem(m); 5822 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5823 } 5824 } 5825 5826 /* 5827 * SADB_GET processing 5828 * receive 5829 * <base, SA(*), address(SD)> 5830 * from the ikmpd, and get a SP and a SA to respond, 5831 * and send, 5832 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5833 * (identity(SD),) (sensitivity)> 5834 * to the ikmpd. 5835 * 5836 * m will always be freed. 5837 */ 5838 static int 5839 key_get(struct socket *so, struct mbuf *m, 5840 const struct sadb_msghdr *mhp) 5841 { 5842 struct sadb_sa *sa0; 5843 struct sadb_address *src0, *dst0; 5844 struct secasindex saidx; 5845 struct secashead *sah; 5846 struct secasvar *sav = NULL; 5847 u_int16_t proto; 5848 int error; 5849 5850 /* sanity check */ 5851 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5852 panic("key_get: NULL pointer is passed"); 5853 5854 /* map satype to proto */ 5855 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5856 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5857 return key_senderror(so, m, EINVAL); 5858 } 5859 5860 if (mhp->ext[SADB_EXT_SA] == NULL || 5861 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5862 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5863 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5864 return key_senderror(so, m, EINVAL); 5865 } 5866 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5867 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5868 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5869 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5870 return key_senderror(so, m, EINVAL); 5871 } 5872 5873 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5874 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5875 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5876 5877 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5878 dst0 + 1, &saidx)) != 0) 5879 return key_senderror(so, m, EINVAL); 5880 5881 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5882 return key_senderror(so, m, EINVAL); 5883 5884 /* get a SA header */ 5885 LIST_FOREACH(sah, &sahtree, chain) { 5886 if (sah->state == SADB_SASTATE_DEAD) 5887 continue; 5888 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5889 continue; 5890 5891 /* get a SA with SPI. */ 5892 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5893 if (sav) 5894 break; 5895 } 5896 if (sah == NULL) { 5897 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5898 return key_senderror(so, m, ENOENT); 5899 } 5900 5901 { 5902 struct mbuf *n; 5903 u_int8_t satype; 5904 5905 /* map proto to satype */ 5906 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5907 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5908 return key_senderror(so, m, EINVAL); 5909 } 5910 5911 /* create new sadb_msg to reply. */ 5912 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5913 mhp->msg->sadb_msg_pid); 5914 if (!n) 5915 return key_senderror(so, m, ENOBUFS); 5916 5917 m_freem(m); 5918 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5919 } 5920 } 5921 5922 /* XXX make it sysctl-configurable? */ 5923 static void 5924 key_getcomb_setlifetime(struct sadb_comb *comb) 5925 { 5926 5927 comb->sadb_comb_soft_allocations = 1; 5928 comb->sadb_comb_hard_allocations = 1; 5929 comb->sadb_comb_soft_bytes = 0; 5930 comb->sadb_comb_hard_bytes = 0; 5931 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5932 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5933 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5934 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5935 } 5936 5937 /* 5938 * XXX reorder combinations by preference 5939 * XXX no idea if the user wants ESP authentication or not 5940 */ 5941 static struct mbuf * 5942 key_getcomb_esp(void) 5943 { 5944 struct sadb_comb *comb; 5945 const struct enc_xform *algo; 5946 struct mbuf *result = NULL, *m, *n; 5947 int encmin; 5948 int i, off, o; 5949 int totlen; 5950 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5951 5952 m = NULL; 5953 for (i = 1; i <= SADB_EALG_MAX; i++) { 5954 algo = esp_algorithm_lookup(i); 5955 if (algo == NULL) 5956 continue; 5957 5958 /* discard algorithms with key size smaller than system min */ 5959 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5960 continue; 5961 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5962 encmin = ipsec_esp_keymin; 5963 else 5964 encmin = _BITS(algo->minkey); 5965 5966 if (ipsec_esp_auth) 5967 m = key_getcomb_ah(); 5968 else { 5969 IPSEC_ASSERT(l <= MLEN, 5970 ("key_getcomb_esp: l=%u > MLEN=%lu", 5971 l, (u_long) MLEN)); 5972 MGET(m, M_DONTWAIT, MT_DATA); 5973 if (m) { 5974 M_ALIGN(m, l); 5975 m->m_len = l; 5976 m->m_next = NULL; 5977 memset(mtod(m, void *), 0, m->m_len); 5978 } 5979 } 5980 if (!m) 5981 goto fail; 5982 5983 totlen = 0; 5984 for (n = m; n; n = n->m_next) 5985 totlen += n->m_len; 5986 IPSEC_ASSERT((totlen % l) == 0, 5987 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5988 5989 for (off = 0; off < totlen; off += l) { 5990 n = m_pulldown(m, off, l, &o); 5991 if (!n) { 5992 /* m is already freed */ 5993 goto fail; 5994 } 5995 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5996 memset(comb, 0, sizeof(*comb)); 5997 key_getcomb_setlifetime(comb); 5998 comb->sadb_comb_encrypt = i; 5999 comb->sadb_comb_encrypt_minbits = encmin; 6000 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6001 } 6002 6003 if (!result) 6004 result = m; 6005 else 6006 m_cat(result, m); 6007 } 6008 6009 return result; 6010 6011 fail: 6012 if (result) 6013 m_freem(result); 6014 return NULL; 6015 } 6016 6017 static void 6018 key_getsizes_ah(const struct auth_hash *ah, int alg, 6019 u_int16_t* ksmin, u_int16_t* ksmax) 6020 { 6021 *ksmin = *ksmax = ah->keysize; 6022 if (ah->keysize == 0) { 6023 /* 6024 * Transform takes arbitrary key size but algorithm 6025 * key size is restricted. Enforce this here. 6026 */ 6027 switch (alg) { 6028 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6029 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6030 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6031 default: 6032 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6033 alg)); 6034 break; 6035 } 6036 } 6037 } 6038 6039 /* 6040 * XXX reorder combinations by preference 6041 */ 6042 static struct mbuf * 6043 key_getcomb_ah(void) 6044 { 6045 struct sadb_comb *comb; 6046 const struct auth_hash *algo; 6047 struct mbuf *m; 6048 u_int16_t minkeysize, maxkeysize; 6049 int i; 6050 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6051 6052 m = NULL; 6053 for (i = 1; i <= SADB_AALG_MAX; i++) { 6054 #if 1 6055 /* we prefer HMAC algorithms, not old algorithms */ 6056 if (i != SADB_AALG_SHA1HMAC && 6057 i != SADB_AALG_MD5HMAC && 6058 i != SADB_X_AALG_SHA2_256 && 6059 i != SADB_X_AALG_SHA2_384 && 6060 i != SADB_X_AALG_SHA2_512) 6061 continue; 6062 #endif 6063 algo = ah_algorithm_lookup(i); 6064 if (!algo) 6065 continue; 6066 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6067 /* discard algorithms with key size smaller than system min */ 6068 if (_BITS(minkeysize) < ipsec_ah_keymin) 6069 continue; 6070 6071 if (!m) { 6072 IPSEC_ASSERT(l <= MLEN, 6073 ("key_getcomb_ah: l=%u > MLEN=%lu", 6074 l, (u_long) MLEN)); 6075 MGET(m, M_DONTWAIT, MT_DATA); 6076 if (m) { 6077 M_ALIGN(m, l); 6078 m->m_len = l; 6079 m->m_next = NULL; 6080 } 6081 } else 6082 M_PREPEND(m, l, M_DONTWAIT); 6083 if (!m) 6084 return NULL; 6085 6086 comb = mtod(m, struct sadb_comb *); 6087 memset(comb, 0, sizeof(*comb)); 6088 key_getcomb_setlifetime(comb); 6089 comb->sadb_comb_auth = i; 6090 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6091 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6092 } 6093 6094 return m; 6095 } 6096 6097 /* 6098 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6099 * XXX reorder combinations by preference 6100 */ 6101 static struct mbuf * 6102 key_getcomb_ipcomp(void) 6103 { 6104 struct sadb_comb *comb; 6105 const struct comp_algo *algo; 6106 struct mbuf *m; 6107 int i; 6108 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6109 6110 m = NULL; 6111 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6112 algo = ipcomp_algorithm_lookup(i); 6113 if (!algo) 6114 continue; 6115 6116 if (!m) { 6117 IPSEC_ASSERT(l <= MLEN, 6118 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6119 l, (u_long) MLEN)); 6120 MGET(m, M_DONTWAIT, MT_DATA); 6121 if (m) { 6122 M_ALIGN(m, l); 6123 m->m_len = l; 6124 m->m_next = NULL; 6125 } 6126 } else 6127 M_PREPEND(m, l, M_DONTWAIT); 6128 if (!m) 6129 return NULL; 6130 6131 comb = mtod(m, struct sadb_comb *); 6132 memset(comb, 0, sizeof(*comb)); 6133 key_getcomb_setlifetime(comb); 6134 comb->sadb_comb_encrypt = i; 6135 /* what should we set into sadb_comb_*_{min,max}bits? */ 6136 } 6137 6138 return m; 6139 } 6140 6141 /* 6142 * XXX no way to pass mode (transport/tunnel) to userland 6143 * XXX replay checking? 6144 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6145 */ 6146 static struct mbuf * 6147 key_getprop(const struct secasindex *saidx) 6148 { 6149 struct sadb_prop *prop; 6150 struct mbuf *m, *n; 6151 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6152 int totlen; 6153 6154 switch (saidx->proto) { 6155 case IPPROTO_ESP: 6156 m = key_getcomb_esp(); 6157 break; 6158 case IPPROTO_AH: 6159 m = key_getcomb_ah(); 6160 break; 6161 case IPPROTO_IPCOMP: 6162 m = key_getcomb_ipcomp(); 6163 break; 6164 default: 6165 return NULL; 6166 } 6167 6168 if (!m) 6169 return NULL; 6170 M_PREPEND(m, l, M_DONTWAIT); 6171 if (!m) 6172 return NULL; 6173 6174 totlen = 0; 6175 for (n = m; n; n = n->m_next) 6176 totlen += n->m_len; 6177 6178 prop = mtod(m, struct sadb_prop *); 6179 memset(prop, 0, sizeof(*prop)); 6180 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6181 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6182 prop->sadb_prop_replay = 32; /* XXX */ 6183 6184 return m; 6185 } 6186 6187 /* 6188 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6189 * send 6190 * <base, SA, address(SD), (address(P)), x_policy, 6191 * (identity(SD),) (sensitivity,) proposal> 6192 * to KMD, and expect to receive 6193 * <base> with SADB_ACQUIRE if error occurred, 6194 * or 6195 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6196 * from KMD by PF_KEY. 6197 * 6198 * XXX x_policy is outside of RFC2367 (KAME extension). 6199 * XXX sensitivity is not supported. 6200 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6201 * see comment for key_getcomb_ipcomp(). 6202 * 6203 * OUT: 6204 * 0 : succeed 6205 * others: error number 6206 */ 6207 static int 6208 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6209 { 6210 struct mbuf *result = NULL, *m; 6211 #ifndef IPSEC_NONBLOCK_ACQUIRE 6212 struct secacq *newacq; 6213 #endif 6214 u_int8_t satype; 6215 int error = -1; 6216 u_int32_t seq; 6217 6218 /* sanity check */ 6219 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6220 satype = key_proto2satype(saidx->proto); 6221 IPSEC_ASSERT(satype != 0, 6222 ("key_acquire: null satype, protocol %u", saidx->proto)); 6223 6224 #ifndef IPSEC_NONBLOCK_ACQUIRE 6225 /* 6226 * We never do anything about acquirng SA. There is anather 6227 * solution that kernel blocks to send SADB_ACQUIRE message until 6228 * getting something message from IKEd. In later case, to be 6229 * managed with ACQUIRING list. 6230 */ 6231 /* Get an entry to check whether sending message or not. */ 6232 if ((newacq = key_getacq(saidx)) != NULL) { 6233 if (key_blockacq_count < newacq->count) { 6234 /* reset counter and do send message. */ 6235 newacq->count = 0; 6236 } else { 6237 /* increment counter and do nothing. */ 6238 newacq->count++; 6239 return 0; 6240 } 6241 } else { 6242 /* make new entry for blocking to send SADB_ACQUIRE. */ 6243 if ((newacq = key_newacq(saidx)) == NULL) 6244 return ENOBUFS; 6245 6246 /* add to acqtree */ 6247 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6248 } 6249 #endif 6250 6251 6252 #ifndef IPSEC_NONBLOCK_ACQUIRE 6253 seq = newacq->seq; 6254 #else 6255 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6256 #endif 6257 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6258 if (!m) { 6259 error = ENOBUFS; 6260 goto fail; 6261 } 6262 result = m; 6263 6264 /* set sadb_address for saidx's. */ 6265 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6266 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6267 if (!m) { 6268 error = ENOBUFS; 6269 goto fail; 6270 } 6271 m_cat(result, m); 6272 6273 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6274 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6275 if (!m) { 6276 error = ENOBUFS; 6277 goto fail; 6278 } 6279 m_cat(result, m); 6280 6281 /* XXX proxy address (optional) */ 6282 6283 /* set sadb_x_policy */ 6284 if (sp) { 6285 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6286 if (!m) { 6287 error = ENOBUFS; 6288 goto fail; 6289 } 6290 m_cat(result, m); 6291 } 6292 6293 /* XXX identity (optional) */ 6294 #if 0 6295 if (idexttype && fqdn) { 6296 /* create identity extension (FQDN) */ 6297 struct sadb_ident *id; 6298 int fqdnlen; 6299 6300 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6301 id = (struct sadb_ident *)p; 6302 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6303 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6304 id->sadb_ident_exttype = idexttype; 6305 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6306 memcpy(id + 1, fqdn, fqdnlen); 6307 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6308 } 6309 6310 if (idexttype) { 6311 /* create identity extension (USERFQDN) */ 6312 struct sadb_ident *id; 6313 int userfqdnlen; 6314 6315 if (userfqdn) { 6316 /* +1 for terminating-NUL */ 6317 userfqdnlen = strlen(userfqdn) + 1; 6318 } else 6319 userfqdnlen = 0; 6320 id = (struct sadb_ident *)p; 6321 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6322 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6323 id->sadb_ident_exttype = idexttype; 6324 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6325 /* XXX is it correct? */ 6326 if (curlwp) 6327 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6328 if (userfqdn && userfqdnlen) 6329 memcpy(id + 1, userfqdn, userfqdnlen); 6330 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6331 } 6332 #endif 6333 6334 /* XXX sensitivity (optional) */ 6335 6336 /* create proposal/combination extension */ 6337 m = key_getprop(saidx); 6338 #if 0 6339 /* 6340 * spec conformant: always attach proposal/combination extension, 6341 * the problem is that we have no way to attach it for ipcomp, 6342 * due to the way sadb_comb is declared in RFC2367. 6343 */ 6344 if (!m) { 6345 error = ENOBUFS; 6346 goto fail; 6347 } 6348 m_cat(result, m); 6349 #else 6350 /* 6351 * outside of spec; make proposal/combination extension optional. 6352 */ 6353 if (m) 6354 m_cat(result, m); 6355 #endif 6356 6357 if ((result->m_flags & M_PKTHDR) == 0) { 6358 error = EINVAL; 6359 goto fail; 6360 } 6361 6362 if (result->m_len < sizeof(struct sadb_msg)) { 6363 result = m_pullup(result, sizeof(struct sadb_msg)); 6364 if (result == NULL) { 6365 error = ENOBUFS; 6366 goto fail; 6367 } 6368 } 6369 6370 result->m_pkthdr.len = 0; 6371 for (m = result; m; m = m->m_next) 6372 result->m_pkthdr.len += m->m_len; 6373 6374 mtod(result, struct sadb_msg *)->sadb_msg_len = 6375 PFKEY_UNIT64(result->m_pkthdr.len); 6376 6377 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6378 6379 fail: 6380 if (result) 6381 m_freem(result); 6382 return error; 6383 } 6384 6385 #ifndef IPSEC_NONBLOCK_ACQUIRE 6386 static struct secacq * 6387 key_newacq(const struct secasindex *saidx) 6388 { 6389 struct secacq *newacq; 6390 6391 /* get new entry */ 6392 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6393 if (newacq == NULL) { 6394 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6395 return NULL; 6396 } 6397 memset(newacq, 0, sizeof(*newacq)); 6398 6399 /* copy secindex */ 6400 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6401 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6402 newacq->created = time_uptime; 6403 newacq->count = 0; 6404 6405 return newacq; 6406 } 6407 6408 static struct secacq * 6409 key_getacq(const struct secasindex *saidx) 6410 { 6411 struct secacq *acq; 6412 6413 LIST_FOREACH(acq, &acqtree, chain) { 6414 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6415 return acq; 6416 } 6417 6418 return NULL; 6419 } 6420 6421 static struct secacq * 6422 key_getacqbyseq(u_int32_t seq) 6423 { 6424 struct secacq *acq; 6425 6426 LIST_FOREACH(acq, &acqtree, chain) { 6427 if (acq->seq == seq) 6428 return acq; 6429 } 6430 6431 return NULL; 6432 } 6433 #endif 6434 6435 static struct secspacq * 6436 key_newspacq(const struct secpolicyindex *spidx) 6437 { 6438 struct secspacq *acq; 6439 6440 /* get new entry */ 6441 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6442 if (acq == NULL) { 6443 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6444 return NULL; 6445 } 6446 memset(acq, 0, sizeof(*acq)); 6447 6448 /* copy secindex */ 6449 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6450 acq->created = time_uptime; 6451 acq->count = 0; 6452 6453 return acq; 6454 } 6455 6456 static struct secspacq * 6457 key_getspacq(const struct secpolicyindex *spidx) 6458 { 6459 struct secspacq *acq; 6460 6461 LIST_FOREACH(acq, &spacqtree, chain) { 6462 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6463 return acq; 6464 } 6465 6466 return NULL; 6467 } 6468 6469 /* 6470 * SADB_ACQUIRE processing, 6471 * in first situation, is receiving 6472 * <base> 6473 * from the ikmpd, and clear sequence of its secasvar entry. 6474 * 6475 * In second situation, is receiving 6476 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6477 * from a user land process, and return 6478 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6479 * to the socket. 6480 * 6481 * m will always be freed. 6482 */ 6483 static int 6484 key_acquire2(struct socket *so, struct mbuf *m, 6485 const struct sadb_msghdr *mhp) 6486 { 6487 const struct sadb_address *src0, *dst0; 6488 struct secasindex saidx; 6489 struct secashead *sah; 6490 u_int16_t proto; 6491 int error; 6492 6493 /* sanity check */ 6494 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6495 panic("key_acquire2: NULL pointer is passed"); 6496 6497 /* 6498 * Error message from KMd. 6499 * We assume that if error was occurred in IKEd, the length of PFKEY 6500 * message is equal to the size of sadb_msg structure. 6501 * We do not raise error even if error occurred in this function. 6502 */ 6503 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6504 #ifndef IPSEC_NONBLOCK_ACQUIRE 6505 struct secacq *acq; 6506 6507 /* check sequence number */ 6508 if (mhp->msg->sadb_msg_seq == 0) { 6509 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6510 m_freem(m); 6511 return 0; 6512 } 6513 6514 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6515 /* 6516 * the specified larval SA is already gone, or we got 6517 * a bogus sequence number. we can silently ignore it. 6518 */ 6519 m_freem(m); 6520 return 0; 6521 } 6522 6523 /* reset acq counter in order to deletion by timehander. */ 6524 acq->created = time_uptime; 6525 acq->count = 0; 6526 #endif 6527 m_freem(m); 6528 return 0; 6529 } 6530 6531 /* 6532 * This message is from user land. 6533 */ 6534 6535 /* map satype to proto */ 6536 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6537 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6538 return key_senderror(so, m, EINVAL); 6539 } 6540 6541 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6542 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6543 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6544 /* error */ 6545 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6546 return key_senderror(so, m, EINVAL); 6547 } 6548 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6549 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6550 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6551 /* error */ 6552 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6553 return key_senderror(so, m, EINVAL); 6554 } 6555 6556 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6557 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6558 6559 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6560 dst0 + 1, &saidx)) != 0) 6561 return key_senderror(so, m, EINVAL); 6562 6563 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6564 return key_senderror(so, m, EINVAL); 6565 6566 /* get a SA index */ 6567 LIST_FOREACH(sah, &sahtree, chain) { 6568 if (sah->state == SADB_SASTATE_DEAD) 6569 continue; 6570 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6571 break; 6572 } 6573 if (sah != NULL) { 6574 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6575 return key_senderror(so, m, EEXIST); 6576 } 6577 6578 error = key_acquire(&saidx, NULL); 6579 if (error != 0) { 6580 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6581 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6582 return key_senderror(so, m, error); 6583 } 6584 6585 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6586 } 6587 6588 /* 6589 * SADB_REGISTER processing. 6590 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6591 * receive 6592 * <base> 6593 * from the ikmpd, and register a socket to send PF_KEY messages, 6594 * and send 6595 * <base, supported> 6596 * to KMD by PF_KEY. 6597 * If socket is detached, must free from regnode. 6598 * 6599 * m will always be freed. 6600 */ 6601 static int 6602 key_register(struct socket *so, struct mbuf *m, 6603 const struct sadb_msghdr *mhp) 6604 { 6605 struct secreg *reg, *newreg = 0; 6606 6607 /* sanity check */ 6608 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6609 panic("key_register: NULL pointer is passed"); 6610 6611 /* check for invalid register message */ 6612 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6613 return key_senderror(so, m, EINVAL); 6614 6615 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6616 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6617 goto setmsg; 6618 6619 /* check whether existing or not */ 6620 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6621 if (reg->so == so) { 6622 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6623 return key_senderror(so, m, EEXIST); 6624 } 6625 } 6626 6627 /* create regnode */ 6628 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6629 if (newreg == NULL) { 6630 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6631 return key_senderror(so, m, ENOBUFS); 6632 } 6633 memset(newreg, 0, sizeof(*newreg)); 6634 6635 newreg->so = so; 6636 ((struct keycb *)sotorawcb(so))->kp_registered++; 6637 6638 /* add regnode to regtree. */ 6639 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6640 6641 setmsg: 6642 { 6643 struct mbuf *n; 6644 struct sadb_msg *newmsg; 6645 struct sadb_supported *sup; 6646 u_int len, alen, elen; 6647 int off; 6648 int i; 6649 struct sadb_alg *alg; 6650 6651 /* create new sadb_msg to reply. */ 6652 alen = 0; 6653 for (i = 1; i <= SADB_AALG_MAX; i++) { 6654 if (ah_algorithm_lookup(i)) 6655 alen += sizeof(struct sadb_alg); 6656 } 6657 if (alen) 6658 alen += sizeof(struct sadb_supported); 6659 elen = 0; 6660 for (i = 1; i <= SADB_EALG_MAX; i++) { 6661 if (esp_algorithm_lookup(i)) 6662 elen += sizeof(struct sadb_alg); 6663 } 6664 if (elen) 6665 elen += sizeof(struct sadb_supported); 6666 6667 len = sizeof(struct sadb_msg) + alen + elen; 6668 6669 if (len > MCLBYTES) 6670 return key_senderror(so, m, ENOBUFS); 6671 6672 MGETHDR(n, M_DONTWAIT, MT_DATA); 6673 if (len > MHLEN) { 6674 MCLGET(n, M_DONTWAIT); 6675 if ((n->m_flags & M_EXT) == 0) { 6676 m_freem(n); 6677 n = NULL; 6678 } 6679 } 6680 if (!n) 6681 return key_senderror(so, m, ENOBUFS); 6682 6683 n->m_pkthdr.len = n->m_len = len; 6684 n->m_next = NULL; 6685 off = 0; 6686 6687 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6688 newmsg = mtod(n, struct sadb_msg *); 6689 newmsg->sadb_msg_errno = 0; 6690 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6691 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6692 6693 /* for authentication algorithm */ 6694 if (alen) { 6695 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6696 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6697 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6698 off += PFKEY_ALIGN8(sizeof(*sup)); 6699 6700 for (i = 1; i <= SADB_AALG_MAX; i++) { 6701 const struct auth_hash *aalgo; 6702 u_int16_t minkeysize, maxkeysize; 6703 6704 aalgo = ah_algorithm_lookup(i); 6705 if (!aalgo) 6706 continue; 6707 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6708 alg->sadb_alg_id = i; 6709 alg->sadb_alg_ivlen = 0; 6710 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6711 alg->sadb_alg_minbits = _BITS(minkeysize); 6712 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6713 off += PFKEY_ALIGN8(sizeof(*alg)); 6714 } 6715 } 6716 6717 /* for encryption algorithm */ 6718 if (elen) { 6719 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6720 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6721 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6722 off += PFKEY_ALIGN8(sizeof(*sup)); 6723 6724 for (i = 1; i <= SADB_EALG_MAX; i++) { 6725 const struct enc_xform *ealgo; 6726 6727 ealgo = esp_algorithm_lookup(i); 6728 if (!ealgo) 6729 continue; 6730 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6731 alg->sadb_alg_id = i; 6732 alg->sadb_alg_ivlen = ealgo->blocksize; 6733 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6734 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6735 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6736 } 6737 } 6738 6739 #ifdef DIAGNOSTIC 6740 if (off != len) 6741 panic("length assumption failed in key_register"); 6742 #endif 6743 6744 m_freem(m); 6745 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6746 } 6747 } 6748 6749 /* 6750 * free secreg entry registered. 6751 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6752 */ 6753 void 6754 key_freereg(struct socket *so) 6755 { 6756 struct secreg *reg; 6757 int i; 6758 6759 /* sanity check */ 6760 if (so == NULL) 6761 panic("key_freereg: NULL pointer is passed"); 6762 6763 /* 6764 * check whether existing or not. 6765 * check all type of SA, because there is a potential that 6766 * one socket is registered to multiple type of SA. 6767 */ 6768 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6769 LIST_FOREACH(reg, ®tree[i], chain) { 6770 if (reg->so == so 6771 && __LIST_CHAINED(reg)) { 6772 LIST_REMOVE(reg, chain); 6773 KFREE(reg); 6774 break; 6775 } 6776 } 6777 } 6778 6779 return; 6780 } 6781 6782 /* 6783 * SADB_EXPIRE processing 6784 * send 6785 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6786 * to KMD by PF_KEY. 6787 * NOTE: We send only soft lifetime extension. 6788 * 6789 * OUT: 0 : succeed 6790 * others : error number 6791 */ 6792 static int 6793 key_expire(struct secasvar *sav) 6794 { 6795 int s; 6796 int satype; 6797 struct mbuf *result = NULL, *m; 6798 int len; 6799 int error = -1; 6800 struct sadb_lifetime *lt; 6801 6802 /* XXX: Why do we lock ? */ 6803 s = splsoftnet(); /*called from softclock()*/ 6804 6805 /* sanity check */ 6806 if (sav == NULL) 6807 panic("key_expire: NULL pointer is passed"); 6808 if (sav->sah == NULL) 6809 panic("key_expire: Why was SA index in SA NULL"); 6810 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6811 panic("key_expire: invalid proto is passed"); 6812 6813 /* set msg header */ 6814 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6815 if (!m) { 6816 error = ENOBUFS; 6817 goto fail; 6818 } 6819 result = m; 6820 6821 /* create SA extension */ 6822 m = key_setsadbsa(sav); 6823 if (!m) { 6824 error = ENOBUFS; 6825 goto fail; 6826 } 6827 m_cat(result, m); 6828 6829 /* create SA extension */ 6830 m = key_setsadbxsa2(sav->sah->saidx.mode, 6831 sav->replay ? sav->replay->count : 0, 6832 sav->sah->saidx.reqid); 6833 if (!m) { 6834 error = ENOBUFS; 6835 goto fail; 6836 } 6837 m_cat(result, m); 6838 6839 /* create lifetime extension (current and soft) */ 6840 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6841 m = key_alloc_mbuf(len); 6842 if (!m || m->m_next) { /*XXX*/ 6843 if (m) 6844 m_freem(m); 6845 error = ENOBUFS; 6846 goto fail; 6847 } 6848 memset(mtod(m, void *), 0, len); 6849 lt = mtod(m, struct sadb_lifetime *); 6850 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6851 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6852 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6853 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6854 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6855 + time_second - time_uptime; 6856 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6857 + time_second - time_uptime; 6858 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6859 memcpy(lt, sav->lft_s, sizeof(*lt)); 6860 m_cat(result, m); 6861 6862 /* set sadb_address for source */ 6863 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6864 &sav->sah->saidx.src.sa, 6865 FULLMASK, IPSEC_ULPROTO_ANY); 6866 if (!m) { 6867 error = ENOBUFS; 6868 goto fail; 6869 } 6870 m_cat(result, m); 6871 6872 /* set sadb_address for destination */ 6873 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6874 &sav->sah->saidx.dst.sa, 6875 FULLMASK, IPSEC_ULPROTO_ANY); 6876 if (!m) { 6877 error = ENOBUFS; 6878 goto fail; 6879 } 6880 m_cat(result, m); 6881 6882 if ((result->m_flags & M_PKTHDR) == 0) { 6883 error = EINVAL; 6884 goto fail; 6885 } 6886 6887 if (result->m_len < sizeof(struct sadb_msg)) { 6888 result = m_pullup(result, sizeof(struct sadb_msg)); 6889 if (result == NULL) { 6890 error = ENOBUFS; 6891 goto fail; 6892 } 6893 } 6894 6895 result->m_pkthdr.len = 0; 6896 for (m = result; m; m = m->m_next) 6897 result->m_pkthdr.len += m->m_len; 6898 6899 mtod(result, struct sadb_msg *)->sadb_msg_len = 6900 PFKEY_UNIT64(result->m_pkthdr.len); 6901 6902 splx(s); 6903 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6904 6905 fail: 6906 if (result) 6907 m_freem(result); 6908 splx(s); 6909 return error; 6910 } 6911 6912 /* 6913 * SADB_FLUSH processing 6914 * receive 6915 * <base> 6916 * from the ikmpd, and free all entries in secastree. 6917 * and send, 6918 * <base> 6919 * to the ikmpd. 6920 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6921 * 6922 * m will always be freed. 6923 */ 6924 static int 6925 key_flush(struct socket *so, struct mbuf *m, 6926 const struct sadb_msghdr *mhp) 6927 { 6928 struct sadb_msg *newmsg; 6929 struct secashead *sah, *nextsah; 6930 struct secasvar *sav, *nextsav; 6931 u_int16_t proto; 6932 u_int8_t state; 6933 u_int stateidx; 6934 6935 /* sanity check */ 6936 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6937 panic("key_flush: NULL pointer is passed"); 6938 6939 /* map satype to proto */ 6940 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6941 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6942 return key_senderror(so, m, EINVAL); 6943 } 6944 6945 /* no SATYPE specified, i.e. flushing all SA. */ 6946 for (sah = LIST_FIRST(&sahtree); 6947 sah != NULL; 6948 sah = nextsah) { 6949 nextsah = LIST_NEXT(sah, chain); 6950 6951 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6952 && proto != sah->saidx.proto) 6953 continue; 6954 6955 for (stateidx = 0; 6956 stateidx < _ARRAYLEN(saorder_state_alive); 6957 stateidx++) { 6958 state = saorder_state_any[stateidx]; 6959 for (sav = LIST_FIRST(&sah->savtree[state]); 6960 sav != NULL; 6961 sav = nextsav) { 6962 6963 nextsav = LIST_NEXT(sav, chain); 6964 6965 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6966 KEY_FREESAV(&sav); 6967 } 6968 } 6969 6970 sah->state = SADB_SASTATE_DEAD; 6971 } 6972 6973 if (m->m_len < sizeof(struct sadb_msg) || 6974 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6975 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6976 return key_senderror(so, m, ENOBUFS); 6977 } 6978 6979 if (m->m_next) 6980 m_freem(m->m_next); 6981 m->m_next = NULL; 6982 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6983 newmsg = mtod(m, struct sadb_msg *); 6984 newmsg->sadb_msg_errno = 0; 6985 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6986 6987 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6988 } 6989 6990 6991 static struct mbuf * 6992 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6993 { 6994 struct secashead *sah; 6995 struct secasvar *sav; 6996 u_int16_t proto; 6997 u_int stateidx; 6998 u_int8_t satype; 6999 u_int8_t state; 7000 int cnt; 7001 struct mbuf *m, *n, *prev; 7002 int totlen; 7003 7004 *lenp = 0; 7005 7006 /* map satype to proto */ 7007 if ((proto = key_satype2proto(req_satype)) == 0) { 7008 *errorp = EINVAL; 7009 return (NULL); 7010 } 7011 7012 /* count sav entries to be sent to userland. */ 7013 cnt = 0; 7014 LIST_FOREACH(sah, &sahtree, chain) { 7015 if (req_satype != SADB_SATYPE_UNSPEC && 7016 proto != sah->saidx.proto) 7017 continue; 7018 7019 for (stateidx = 0; 7020 stateidx < _ARRAYLEN(saorder_state_any); 7021 stateidx++) { 7022 state = saorder_state_any[stateidx]; 7023 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7024 cnt++; 7025 } 7026 } 7027 } 7028 7029 if (cnt == 0) { 7030 *errorp = ENOENT; 7031 return (NULL); 7032 } 7033 7034 /* send this to the userland, one at a time. */ 7035 m = NULL; 7036 prev = m; 7037 LIST_FOREACH(sah, &sahtree, chain) { 7038 if (req_satype != SADB_SATYPE_UNSPEC && 7039 proto != sah->saidx.proto) 7040 continue; 7041 7042 /* map proto to satype */ 7043 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7044 m_freem(m); 7045 *errorp = EINVAL; 7046 return (NULL); 7047 } 7048 7049 for (stateidx = 0; 7050 stateidx < _ARRAYLEN(saorder_state_any); 7051 stateidx++) { 7052 state = saorder_state_any[stateidx]; 7053 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7054 n = key_setdumpsa(sav, SADB_DUMP, satype, 7055 --cnt, pid); 7056 if (!n) { 7057 m_freem(m); 7058 *errorp = ENOBUFS; 7059 return (NULL); 7060 } 7061 7062 totlen += n->m_pkthdr.len; 7063 if (!m) 7064 m = n; 7065 else 7066 prev->m_nextpkt = n; 7067 prev = n; 7068 } 7069 } 7070 } 7071 7072 if (!m) { 7073 *errorp = EINVAL; 7074 return (NULL); 7075 } 7076 7077 if ((m->m_flags & M_PKTHDR) != 0) { 7078 m->m_pkthdr.len = 0; 7079 for (n = m; n; n = n->m_next) 7080 m->m_pkthdr.len += n->m_len; 7081 } 7082 7083 *errorp = 0; 7084 return (m); 7085 } 7086 7087 /* 7088 * SADB_DUMP processing 7089 * dump all entries including status of DEAD in SAD. 7090 * receive 7091 * <base> 7092 * from the ikmpd, and dump all secasvar leaves 7093 * and send, 7094 * <base> ..... 7095 * to the ikmpd. 7096 * 7097 * m will always be freed. 7098 */ 7099 static int 7100 key_dump(struct socket *so, struct mbuf *m0, 7101 const struct sadb_msghdr *mhp) 7102 { 7103 u_int16_t proto; 7104 u_int8_t satype; 7105 struct mbuf *n; 7106 int s; 7107 int error, len, ok; 7108 7109 /* sanity check */ 7110 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7111 panic("key_dump: NULL pointer is passed"); 7112 7113 /* map satype to proto */ 7114 satype = mhp->msg->sadb_msg_satype; 7115 if ((proto = key_satype2proto(satype)) == 0) { 7116 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7117 return key_senderror(so, m0, EINVAL); 7118 } 7119 7120 /* 7121 * If the requestor has insufficient socket-buffer space 7122 * for the entire chain, nobody gets any response to the DUMP. 7123 * XXX For now, only the requestor ever gets anything. 7124 * Moreover, if the requestor has any space at all, they receive 7125 * the entire chain, otherwise the request is refused with ENOBUFS. 7126 */ 7127 if (sbspace(&so->so_rcv) <= 0) { 7128 return key_senderror(so, m0, ENOBUFS); 7129 } 7130 7131 s = splsoftnet(); 7132 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7133 splx(s); 7134 7135 if (n == NULL) { 7136 return key_senderror(so, m0, ENOENT); 7137 } 7138 { 7139 uint64_t *ps = PFKEY_STAT_GETREF(); 7140 ps[PFKEY_STAT_IN_TOTAL]++; 7141 ps[PFKEY_STAT_IN_BYTES] += len; 7142 PFKEY_STAT_PUTREF(); 7143 } 7144 7145 /* 7146 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7147 * The requestor receives either the entire chain, or an 7148 * error message with ENOBUFS. 7149 * 7150 * sbappendaddrchain() takes the chain of entries, one 7151 * packet-record per SPD entry, prepends the key_src sockaddr 7152 * to each packet-record, links the sockaddr mbufs into a new 7153 * list of records, then appends the entire resulting 7154 * list to the requesting socket. 7155 */ 7156 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7157 n, SB_PRIO_ONESHOT_OVERFLOW); 7158 7159 if (!ok) { 7160 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7161 m_freem(n); 7162 return key_senderror(so, m0, ENOBUFS); 7163 } 7164 7165 m_freem(m0); 7166 return 0; 7167 } 7168 7169 /* 7170 * SADB_X_PROMISC processing 7171 * 7172 * m will always be freed. 7173 */ 7174 static int 7175 key_promisc(struct socket *so, struct mbuf *m, 7176 const struct sadb_msghdr *mhp) 7177 { 7178 int olen; 7179 7180 /* sanity check */ 7181 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7182 panic("key_promisc: NULL pointer is passed"); 7183 7184 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7185 7186 if (olen < sizeof(struct sadb_msg)) { 7187 #if 1 7188 return key_senderror(so, m, EINVAL); 7189 #else 7190 m_freem(m); 7191 return 0; 7192 #endif 7193 } else if (olen == sizeof(struct sadb_msg)) { 7194 /* enable/disable promisc mode */ 7195 struct keycb *kp; 7196 7197 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7198 return key_senderror(so, m, EINVAL); 7199 mhp->msg->sadb_msg_errno = 0; 7200 switch (mhp->msg->sadb_msg_satype) { 7201 case 0: 7202 case 1: 7203 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7204 break; 7205 default: 7206 return key_senderror(so, m, EINVAL); 7207 } 7208 7209 /* send the original message back to everyone */ 7210 mhp->msg->sadb_msg_errno = 0; 7211 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7212 } else { 7213 /* send packet as is */ 7214 7215 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7216 7217 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7218 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7219 } 7220 } 7221 7222 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7223 const struct sadb_msghdr *) = { 7224 NULL, /* SADB_RESERVED */ 7225 key_getspi, /* SADB_GETSPI */ 7226 key_update, /* SADB_UPDATE */ 7227 key_add, /* SADB_ADD */ 7228 key_delete, /* SADB_DELETE */ 7229 key_get, /* SADB_GET */ 7230 key_acquire2, /* SADB_ACQUIRE */ 7231 key_register, /* SADB_REGISTER */ 7232 NULL, /* SADB_EXPIRE */ 7233 key_flush, /* SADB_FLUSH */ 7234 key_dump, /* SADB_DUMP */ 7235 key_promisc, /* SADB_X_PROMISC */ 7236 NULL, /* SADB_X_PCHANGE */ 7237 key_spdadd, /* SADB_X_SPDUPDATE */ 7238 key_spdadd, /* SADB_X_SPDADD */ 7239 key_spddelete, /* SADB_X_SPDDELETE */ 7240 key_spdget, /* SADB_X_SPDGET */ 7241 NULL, /* SADB_X_SPDACQUIRE */ 7242 key_spddump, /* SADB_X_SPDDUMP */ 7243 key_spdflush, /* SADB_X_SPDFLUSH */ 7244 key_spdadd, /* SADB_X_SPDSETIDX */ 7245 NULL, /* SADB_X_SPDEXPIRE */ 7246 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7247 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7248 }; 7249 7250 /* 7251 * parse sadb_msg buffer to process PFKEYv2, 7252 * and create a data to response if needed. 7253 * I think to be dealed with mbuf directly. 7254 * IN: 7255 * msgp : pointer to pointer to a received buffer pulluped. 7256 * This is rewrited to response. 7257 * so : pointer to socket. 7258 * OUT: 7259 * length for buffer to send to user process. 7260 */ 7261 int 7262 key_parse(struct mbuf *m, struct socket *so) 7263 { 7264 struct sadb_msg *msg; 7265 struct sadb_msghdr mh; 7266 u_int orglen; 7267 int error; 7268 int target; 7269 7270 /* sanity check */ 7271 if (m == NULL || so == NULL) 7272 panic("key_parse: NULL pointer is passed"); 7273 7274 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7275 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7276 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7277 kdebug_sadb(msg)); 7278 #endif 7279 7280 if (m->m_len < sizeof(struct sadb_msg)) { 7281 m = m_pullup(m, sizeof(struct sadb_msg)); 7282 if (!m) 7283 return ENOBUFS; 7284 } 7285 msg = mtod(m, struct sadb_msg *); 7286 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7287 target = KEY_SENDUP_ONE; 7288 7289 if ((m->m_flags & M_PKTHDR) == 0 || 7290 m->m_pkthdr.len != m->m_pkthdr.len) { 7291 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7292 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7293 error = EINVAL; 7294 goto senderror; 7295 } 7296 7297 if (msg->sadb_msg_version != PF_KEY_V2) { 7298 ipseclog((LOG_DEBUG, 7299 "key_parse: PF_KEY version %u is mismatched.\n", 7300 msg->sadb_msg_version)); 7301 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7302 error = EINVAL; 7303 goto senderror; 7304 } 7305 7306 if (msg->sadb_msg_type > SADB_MAX) { 7307 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7308 msg->sadb_msg_type)); 7309 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7310 error = EINVAL; 7311 goto senderror; 7312 } 7313 7314 /* for old-fashioned code - should be nuked */ 7315 if (m->m_pkthdr.len > MCLBYTES) { 7316 m_freem(m); 7317 return ENOBUFS; 7318 } 7319 if (m->m_next) { 7320 struct mbuf *n; 7321 7322 MGETHDR(n, M_DONTWAIT, MT_DATA); 7323 if (n && m->m_pkthdr.len > MHLEN) { 7324 MCLGET(n, M_DONTWAIT); 7325 if ((n->m_flags & M_EXT) == 0) { 7326 m_free(n); 7327 n = NULL; 7328 } 7329 } 7330 if (!n) { 7331 m_freem(m); 7332 return ENOBUFS; 7333 } 7334 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7335 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7336 n->m_next = NULL; 7337 m_freem(m); 7338 m = n; 7339 } 7340 7341 /* align the mbuf chain so that extensions are in contiguous region. */ 7342 error = key_align(m, &mh); 7343 if (error) 7344 return error; 7345 7346 if (m->m_next) { /*XXX*/ 7347 m_freem(m); 7348 return ENOBUFS; 7349 } 7350 7351 msg = mh.msg; 7352 7353 /* check SA type */ 7354 switch (msg->sadb_msg_satype) { 7355 case SADB_SATYPE_UNSPEC: 7356 switch (msg->sadb_msg_type) { 7357 case SADB_GETSPI: 7358 case SADB_UPDATE: 7359 case SADB_ADD: 7360 case SADB_DELETE: 7361 case SADB_GET: 7362 case SADB_ACQUIRE: 7363 case SADB_EXPIRE: 7364 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7365 "when msg type=%u.\n", msg->sadb_msg_type)); 7366 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7367 error = EINVAL; 7368 goto senderror; 7369 } 7370 break; 7371 case SADB_SATYPE_AH: 7372 case SADB_SATYPE_ESP: 7373 case SADB_X_SATYPE_IPCOMP: 7374 case SADB_X_SATYPE_TCPSIGNATURE: 7375 switch (msg->sadb_msg_type) { 7376 case SADB_X_SPDADD: 7377 case SADB_X_SPDDELETE: 7378 case SADB_X_SPDGET: 7379 case SADB_X_SPDDUMP: 7380 case SADB_X_SPDFLUSH: 7381 case SADB_X_SPDSETIDX: 7382 case SADB_X_SPDUPDATE: 7383 case SADB_X_SPDDELETE2: 7384 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7385 msg->sadb_msg_type)); 7386 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7387 error = EINVAL; 7388 goto senderror; 7389 } 7390 break; 7391 case SADB_SATYPE_RSVP: 7392 case SADB_SATYPE_OSPFV2: 7393 case SADB_SATYPE_RIPV2: 7394 case SADB_SATYPE_MIP: 7395 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7396 msg->sadb_msg_satype)); 7397 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7398 error = EOPNOTSUPP; 7399 goto senderror; 7400 case 1: /* XXX: What does it do? */ 7401 if (msg->sadb_msg_type == SADB_X_PROMISC) 7402 break; 7403 /*FALLTHROUGH*/ 7404 default: 7405 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7406 msg->sadb_msg_satype)); 7407 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7408 error = EINVAL; 7409 goto senderror; 7410 } 7411 7412 /* check field of upper layer protocol and address family */ 7413 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7414 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7415 struct sadb_address *src0, *dst0; 7416 u_int plen; 7417 7418 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7419 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7420 7421 /* check upper layer protocol */ 7422 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7423 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7424 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7425 error = EINVAL; 7426 goto senderror; 7427 } 7428 7429 /* check family */ 7430 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7431 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7432 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7433 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7434 error = EINVAL; 7435 goto senderror; 7436 } 7437 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7438 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7439 ipseclog((LOG_DEBUG, 7440 "key_parse: address struct size mismatched.\n")); 7441 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7442 error = EINVAL; 7443 goto senderror; 7444 } 7445 7446 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7447 case AF_INET: 7448 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7449 sizeof(struct sockaddr_in)) { 7450 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7451 error = EINVAL; 7452 goto senderror; 7453 } 7454 break; 7455 case AF_INET6: 7456 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7457 sizeof(struct sockaddr_in6)) { 7458 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7459 error = EINVAL; 7460 goto senderror; 7461 } 7462 break; 7463 default: 7464 ipseclog((LOG_DEBUG, 7465 "key_parse: unsupported address family.\n")); 7466 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7467 error = EAFNOSUPPORT; 7468 goto senderror; 7469 } 7470 7471 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7472 case AF_INET: 7473 plen = sizeof(struct in_addr) << 3; 7474 break; 7475 case AF_INET6: 7476 plen = sizeof(struct in6_addr) << 3; 7477 break; 7478 default: 7479 plen = 0; /*fool gcc*/ 7480 break; 7481 } 7482 7483 /* check max prefix length */ 7484 if (src0->sadb_address_prefixlen > plen || 7485 dst0->sadb_address_prefixlen > plen) { 7486 ipseclog((LOG_DEBUG, 7487 "key_parse: illegal prefixlen.\n")); 7488 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7489 error = EINVAL; 7490 goto senderror; 7491 } 7492 7493 /* 7494 * prefixlen == 0 is valid because there can be a case when 7495 * all addresses are matched. 7496 */ 7497 } 7498 7499 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7500 key_typesw[msg->sadb_msg_type] == NULL) { 7501 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7502 error = EINVAL; 7503 goto senderror; 7504 } 7505 7506 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7507 7508 senderror: 7509 msg->sadb_msg_errno = error; 7510 return key_sendup_mbuf(so, m, target); 7511 } 7512 7513 static int 7514 key_senderror(struct socket *so, struct mbuf *m, int code) 7515 { 7516 struct sadb_msg *msg; 7517 7518 if (m->m_len < sizeof(struct sadb_msg)) 7519 panic("invalid mbuf passed to key_senderror"); 7520 7521 msg = mtod(m, struct sadb_msg *); 7522 msg->sadb_msg_errno = code; 7523 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7524 } 7525 7526 /* 7527 * set the pointer to each header into message buffer. 7528 * m will be freed on error. 7529 * XXX larger-than-MCLBYTES extension? 7530 */ 7531 static int 7532 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7533 { 7534 struct mbuf *n; 7535 struct sadb_ext *ext; 7536 size_t off, end; 7537 int extlen; 7538 int toff; 7539 7540 /* sanity check */ 7541 if (m == NULL || mhp == NULL) 7542 panic("key_align: NULL pointer is passed"); 7543 if (m->m_len < sizeof(struct sadb_msg)) 7544 panic("invalid mbuf passed to key_align"); 7545 7546 /* initialize */ 7547 memset(mhp, 0, sizeof(*mhp)); 7548 7549 mhp->msg = mtod(m, struct sadb_msg *); 7550 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7551 7552 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7553 extlen = end; /*just in case extlen is not updated*/ 7554 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7555 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7556 if (!n) { 7557 /* m is already freed */ 7558 return ENOBUFS; 7559 } 7560 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7561 7562 /* set pointer */ 7563 switch (ext->sadb_ext_type) { 7564 case SADB_EXT_SA: 7565 case SADB_EXT_ADDRESS_SRC: 7566 case SADB_EXT_ADDRESS_DST: 7567 case SADB_EXT_ADDRESS_PROXY: 7568 case SADB_EXT_LIFETIME_CURRENT: 7569 case SADB_EXT_LIFETIME_HARD: 7570 case SADB_EXT_LIFETIME_SOFT: 7571 case SADB_EXT_KEY_AUTH: 7572 case SADB_EXT_KEY_ENCRYPT: 7573 case SADB_EXT_IDENTITY_SRC: 7574 case SADB_EXT_IDENTITY_DST: 7575 case SADB_EXT_SENSITIVITY: 7576 case SADB_EXT_PROPOSAL: 7577 case SADB_EXT_SUPPORTED_AUTH: 7578 case SADB_EXT_SUPPORTED_ENCRYPT: 7579 case SADB_EXT_SPIRANGE: 7580 case SADB_X_EXT_POLICY: 7581 case SADB_X_EXT_SA2: 7582 case SADB_X_EXT_NAT_T_TYPE: 7583 case SADB_X_EXT_NAT_T_SPORT: 7584 case SADB_X_EXT_NAT_T_DPORT: 7585 case SADB_X_EXT_NAT_T_OAI: 7586 case SADB_X_EXT_NAT_T_OAR: 7587 case SADB_X_EXT_NAT_T_FRAG: 7588 /* duplicate check */ 7589 /* 7590 * XXX Are there duplication payloads of either 7591 * KEY_AUTH or KEY_ENCRYPT ? 7592 */ 7593 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7594 ipseclog((LOG_DEBUG, 7595 "key_align: duplicate ext_type %u " 7596 "is passed.\n", ext->sadb_ext_type)); 7597 m_freem(m); 7598 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7599 return EINVAL; 7600 } 7601 break; 7602 default: 7603 ipseclog((LOG_DEBUG, 7604 "key_align: invalid ext_type %u is passed.\n", 7605 ext->sadb_ext_type)); 7606 m_freem(m); 7607 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7608 return EINVAL; 7609 } 7610 7611 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7612 7613 if (key_validate_ext(ext, extlen)) { 7614 m_freem(m); 7615 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7616 return EINVAL; 7617 } 7618 7619 n = m_pulldown(m, off, extlen, &toff); 7620 if (!n) { 7621 /* m is already freed */ 7622 return ENOBUFS; 7623 } 7624 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7625 7626 mhp->ext[ext->sadb_ext_type] = ext; 7627 mhp->extoff[ext->sadb_ext_type] = off; 7628 mhp->extlen[ext->sadb_ext_type] = extlen; 7629 } 7630 7631 if (off != end) { 7632 m_freem(m); 7633 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7634 return EINVAL; 7635 } 7636 7637 return 0; 7638 } 7639 7640 static int 7641 key_validate_ext(const struct sadb_ext *ext, int len) 7642 { 7643 const struct sockaddr *sa; 7644 enum { NONE, ADDR } checktype = NONE; 7645 int baselen = 0; 7646 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7647 7648 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7649 return EINVAL; 7650 7651 /* if it does not match minimum/maximum length, bail */ 7652 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7653 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7654 return EINVAL; 7655 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7656 return EINVAL; 7657 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7658 return EINVAL; 7659 7660 /* more checks based on sadb_ext_type XXX need more */ 7661 switch (ext->sadb_ext_type) { 7662 case SADB_EXT_ADDRESS_SRC: 7663 case SADB_EXT_ADDRESS_DST: 7664 case SADB_EXT_ADDRESS_PROXY: 7665 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7666 checktype = ADDR; 7667 break; 7668 case SADB_EXT_IDENTITY_SRC: 7669 case SADB_EXT_IDENTITY_DST: 7670 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7671 SADB_X_IDENTTYPE_ADDR) { 7672 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7673 checktype = ADDR; 7674 } else 7675 checktype = NONE; 7676 break; 7677 default: 7678 checktype = NONE; 7679 break; 7680 } 7681 7682 switch (checktype) { 7683 case NONE: 7684 break; 7685 case ADDR: 7686 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7687 if (len < baselen + sal) 7688 return EINVAL; 7689 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7690 return EINVAL; 7691 break; 7692 } 7693 7694 return 0; 7695 } 7696 7697 static int 7698 key_do_init(void) 7699 { 7700 int i; 7701 7702 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7703 7704 callout_init(&key_timehandler_ch, 0); 7705 7706 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7707 LIST_INIT(&sptree[i]); 7708 } 7709 7710 LIST_INIT(&sahtree); 7711 7712 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7713 LIST_INIT(®tree[i]); 7714 } 7715 7716 #ifndef IPSEC_NONBLOCK_ACQUIRE 7717 LIST_INIT(&acqtree); 7718 #endif 7719 LIST_INIT(&spacqtree); 7720 7721 /* system default */ 7722 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7723 ip4_def_policy.refcnt++; /*never reclaim this*/ 7724 7725 #ifdef INET6 7726 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7727 ip6_def_policy.refcnt++; /*never reclaim this*/ 7728 #endif 7729 7730 7731 #ifndef IPSEC_DEBUG2 7732 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7733 #endif /*IPSEC_DEBUG2*/ 7734 7735 /* initialize key statistics */ 7736 keystat.getspi_count = 1; 7737 7738 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7739 7740 return (0); 7741 } 7742 7743 void 7744 key_init(void) 7745 { 7746 static ONCE_DECL(key_init_once); 7747 7748 RUN_ONCE(&key_init_once, key_do_init); 7749 } 7750 7751 /* 7752 * XXX: maybe This function is called after INBOUND IPsec processing. 7753 * 7754 * Special check for tunnel-mode packets. 7755 * We must make some checks for consistency between inner and outer IP header. 7756 * 7757 * xxx more checks to be provided 7758 */ 7759 int 7760 key_checktunnelsanity( 7761 struct secasvar *sav, 7762 u_int family, 7763 void *src, 7764 void *dst 7765 ) 7766 { 7767 /* sanity check */ 7768 if (sav->sah == NULL) 7769 panic("sav->sah == NULL at key_checktunnelsanity"); 7770 7771 /* XXX: check inner IP header */ 7772 7773 return 1; 7774 } 7775 7776 #if 0 7777 #define hostnamelen strlen(hostname) 7778 7779 /* 7780 * Get FQDN for the host. 7781 * If the administrator configured hostname (by hostname(1)) without 7782 * domain name, returns nothing. 7783 */ 7784 static const char * 7785 key_getfqdn(void) 7786 { 7787 int i; 7788 int hasdot; 7789 static char fqdn[MAXHOSTNAMELEN + 1]; 7790 7791 if (!hostnamelen) 7792 return NULL; 7793 7794 /* check if it comes with domain name. */ 7795 hasdot = 0; 7796 for (i = 0; i < hostnamelen; i++) { 7797 if (hostname[i] == '.') 7798 hasdot++; 7799 } 7800 if (!hasdot) 7801 return NULL; 7802 7803 /* NOTE: hostname may not be NUL-terminated. */ 7804 memset(fqdn, 0, sizeof(fqdn)); 7805 memcpy(fqdn, hostname, hostnamelen); 7806 fqdn[hostnamelen] = '\0'; 7807 return fqdn; 7808 } 7809 7810 /* 7811 * get username@FQDN for the host/user. 7812 */ 7813 static const char * 7814 key_getuserfqdn(void) 7815 { 7816 const char *host; 7817 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7818 struct proc *p = curproc; 7819 char *q; 7820 7821 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7822 return NULL; 7823 if (!(host = key_getfqdn())) 7824 return NULL; 7825 7826 /* NOTE: s_login may not be-NUL terminated. */ 7827 memset(userfqdn, 0, sizeof(userfqdn)); 7828 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7829 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7830 q = userfqdn + strlen(userfqdn); 7831 *q++ = '@'; 7832 memcpy(q, host, strlen(host)); 7833 q += strlen(host); 7834 *q++ = '\0'; 7835 7836 return userfqdn; 7837 } 7838 #endif 7839 7840 /* record data transfer on SA, and update timestamps */ 7841 void 7842 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7843 { 7844 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7845 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7846 if (!sav->lft_c) 7847 return; 7848 7849 /* 7850 * XXX Currently, there is a difference of bytes size 7851 * between inbound and outbound processing. 7852 */ 7853 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7854 /* to check bytes lifetime is done in key_timehandler(). */ 7855 7856 /* 7857 * We use the number of packets as the unit of 7858 * sadb_lifetime_allocations. We increment the variable 7859 * whenever {esp,ah}_{in,out}put is called. 7860 */ 7861 sav->lft_c->sadb_lifetime_allocations++; 7862 /* XXX check for expires? */ 7863 7864 /* 7865 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7866 * in seconds. HARD and SOFT lifetime are measured by the time 7867 * difference (again in seconds) from sadb_lifetime_usetime. 7868 * 7869 * usetime 7870 * v expire expire 7871 * -----+-----+--------+---> t 7872 * <--------------> HARD 7873 * <-----> SOFT 7874 */ 7875 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7876 /* XXX check for expires? */ 7877 7878 return; 7879 } 7880 7881 /* dumb version */ 7882 void 7883 key_sa_routechange(struct sockaddr *dst) 7884 { 7885 struct secashead *sah; 7886 struct route *ro; 7887 const struct sockaddr *sa; 7888 7889 LIST_FOREACH(sah, &sahtree, chain) { 7890 ro = &sah->sa_route; 7891 sa = rtcache_getdst(ro); 7892 if (sa != NULL && dst->sa_len == sa->sa_len && 7893 memcmp(dst, sa, dst->sa_len) == 0) 7894 rtcache_free(ro); 7895 } 7896 7897 return; 7898 } 7899 7900 static void 7901 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7902 { 7903 if (sav == NULL) 7904 panic("key_sa_chgstate called with sav == NULL"); 7905 7906 if (sav->state == state) 7907 return; 7908 7909 if (__LIST_CHAINED(sav)) 7910 LIST_REMOVE(sav, chain); 7911 7912 sav->state = state; 7913 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7914 } 7915 7916 /* XXX too much? */ 7917 static struct mbuf * 7918 key_alloc_mbuf(int l) 7919 { 7920 struct mbuf *m = NULL, *n; 7921 int len, t; 7922 7923 len = l; 7924 while (len > 0) { 7925 MGET(n, M_DONTWAIT, MT_DATA); 7926 if (n && len > MLEN) 7927 MCLGET(n, M_DONTWAIT); 7928 if (!n) { 7929 m_freem(m); 7930 return NULL; 7931 } 7932 7933 n->m_next = NULL; 7934 n->m_len = 0; 7935 n->m_len = M_TRAILINGSPACE(n); 7936 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7937 if (n->m_len > len) { 7938 t = (n->m_len - len) & ~(sizeof(long) - 1); 7939 n->m_data += t; 7940 n->m_len = len; 7941 } 7942 7943 len -= n->m_len; 7944 7945 if (m) 7946 m_cat(m, n); 7947 else 7948 m = n; 7949 } 7950 7951 return m; 7952 } 7953 7954 static struct mbuf * 7955 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7956 { 7957 struct secashead *sah; 7958 struct secasvar *sav; 7959 u_int16_t proto; 7960 u_int stateidx; 7961 u_int8_t satype; 7962 u_int8_t state; 7963 int cnt; 7964 struct mbuf *m, *n; 7965 7966 /* map satype to proto */ 7967 if ((proto = key_satype2proto(req_satype)) == 0) { 7968 *errorp = EINVAL; 7969 return (NULL); 7970 } 7971 7972 /* count sav entries to be sent to the userland. */ 7973 cnt = 0; 7974 LIST_FOREACH(sah, &sahtree, chain) { 7975 if (req_satype != SADB_SATYPE_UNSPEC && 7976 proto != sah->saidx.proto) 7977 continue; 7978 7979 for (stateidx = 0; 7980 stateidx < _ARRAYLEN(saorder_state_any); 7981 stateidx++) { 7982 state = saorder_state_any[stateidx]; 7983 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7984 cnt++; 7985 } 7986 } 7987 } 7988 7989 if (cnt == 0) { 7990 *errorp = ENOENT; 7991 return (NULL); 7992 } 7993 7994 /* send this to the userland, one at a time. */ 7995 m = NULL; 7996 LIST_FOREACH(sah, &sahtree, chain) { 7997 if (req_satype != SADB_SATYPE_UNSPEC && 7998 proto != sah->saidx.proto) 7999 continue; 8000 8001 /* map proto to satype */ 8002 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8003 m_freem(m); 8004 *errorp = EINVAL; 8005 return (NULL); 8006 } 8007 8008 for (stateidx = 0; 8009 stateidx < _ARRAYLEN(saorder_state_any); 8010 stateidx++) { 8011 state = saorder_state_any[stateidx]; 8012 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8013 n = key_setdumpsa(sav, SADB_DUMP, satype, 8014 --cnt, pid); 8015 if (!n) { 8016 m_freem(m); 8017 *errorp = ENOBUFS; 8018 return (NULL); 8019 } 8020 8021 if (!m) 8022 m = n; 8023 else 8024 m_cat(m, n); 8025 } 8026 } 8027 } 8028 8029 if (!m) { 8030 *errorp = EINVAL; 8031 return (NULL); 8032 } 8033 8034 if ((m->m_flags & M_PKTHDR) != 0) { 8035 m->m_pkthdr.len = 0; 8036 for (n = m; n; n = n->m_next) 8037 m->m_pkthdr.len += n->m_len; 8038 } 8039 8040 *errorp = 0; 8041 return (m); 8042 } 8043 8044 static struct mbuf * 8045 key_setspddump(int *errorp, pid_t pid) 8046 { 8047 struct secpolicy *sp; 8048 int cnt; 8049 u_int dir; 8050 struct mbuf *m, *n; 8051 8052 /* search SPD entry and get buffer size. */ 8053 cnt = 0; 8054 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8055 LIST_FOREACH(sp, &sptree[dir], chain) { 8056 cnt++; 8057 } 8058 } 8059 8060 if (cnt == 0) { 8061 *errorp = ENOENT; 8062 return (NULL); 8063 } 8064 8065 m = NULL; 8066 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8067 LIST_FOREACH(sp, &sptree[dir], chain) { 8068 --cnt; 8069 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8070 8071 if (!n) { 8072 *errorp = ENOBUFS; 8073 m_freem(m); 8074 return (NULL); 8075 } 8076 if (!m) 8077 m = n; 8078 else { 8079 m->m_pkthdr.len += n->m_pkthdr.len; 8080 m_cat(m, n); 8081 } 8082 } 8083 } 8084 8085 *errorp = 0; 8086 return (m); 8087 } 8088 8089 static int 8090 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8091 { 8092 struct mbuf *m, *n; 8093 int err2 = 0; 8094 char *p, *ep; 8095 size_t len; 8096 int s, error; 8097 8098 if (newp) 8099 return (EPERM); 8100 if (namelen != 1) 8101 return (EINVAL); 8102 8103 s = splsoftnet(); 8104 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8105 splx(s); 8106 if (!m) 8107 return (error); 8108 if (!oldp) 8109 *oldlenp = m->m_pkthdr.len; 8110 else { 8111 p = oldp; 8112 if (*oldlenp < m->m_pkthdr.len) { 8113 err2 = ENOMEM; 8114 ep = p + *oldlenp; 8115 } else { 8116 *oldlenp = m->m_pkthdr.len; 8117 ep = p + m->m_pkthdr.len; 8118 } 8119 for (n = m; n; n = n->m_next) { 8120 len = (ep - p < n->m_len) ? 8121 ep - p : n->m_len; 8122 error = copyout(mtod(n, const void *), p, len); 8123 p += len; 8124 if (error) 8125 break; 8126 } 8127 if (error == 0) 8128 error = err2; 8129 } 8130 m_freem(m); 8131 8132 return (error); 8133 } 8134 8135 static int 8136 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8137 { 8138 struct mbuf *m, *n; 8139 int err2 = 0; 8140 char *p, *ep; 8141 size_t len; 8142 int s, error; 8143 8144 if (newp) 8145 return (EPERM); 8146 if (namelen != 0) 8147 return (EINVAL); 8148 8149 s = splsoftnet(); 8150 m = key_setspddump(&error, l->l_proc->p_pid); 8151 splx(s); 8152 if (!m) 8153 return (error); 8154 if (!oldp) 8155 *oldlenp = m->m_pkthdr.len; 8156 else { 8157 p = oldp; 8158 if (*oldlenp < m->m_pkthdr.len) { 8159 err2 = ENOMEM; 8160 ep = p + *oldlenp; 8161 } else { 8162 *oldlenp = m->m_pkthdr.len; 8163 ep = p + m->m_pkthdr.len; 8164 } 8165 for (n = m; n; n = n->m_next) { 8166 len = (ep - p < n->m_len) ? 8167 ep - p : n->m_len; 8168 error = copyout(mtod(n, const void *), p, len); 8169 p += len; 8170 if (error) 8171 break; 8172 } 8173 if (error == 0) 8174 error = err2; 8175 } 8176 m_freem(m); 8177 8178 return (error); 8179 } 8180 8181 /* 8182 * Create sysctl tree for native IPSEC key knobs, originally 8183 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8184 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8185 * and in any case the part of our sysctl namespace used for dumping the 8186 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8187 * namespace, for API reasons. 8188 * 8189 * Pending a consensus on the right way to fix this, add a level of 8190 * indirection in how we number the `native' IPSEC key nodes; 8191 * and (as requested by Andrew Brown) move registration of the 8192 * KAME-compatible names to a separate function. 8193 */ 8194 #if 0 8195 # define IPSEC_PFKEY PF_KEY_V2 8196 # define IPSEC_PFKEY_NAME "keyv2" 8197 #else 8198 # define IPSEC_PFKEY PF_KEY 8199 # define IPSEC_PFKEY_NAME "key" 8200 #endif 8201 8202 static int 8203 sysctl_net_key_stats(SYSCTLFN_ARGS) 8204 { 8205 8206 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8207 } 8208 8209 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8210 { 8211 8212 sysctl_createv(clog, 0, NULL, NULL, 8213 CTLFLAG_PERMANENT, 8214 CTLTYPE_NODE, "net", NULL, 8215 NULL, 0, NULL, 0, 8216 CTL_NET, CTL_EOL); 8217 sysctl_createv(clog, 0, NULL, NULL, 8218 CTLFLAG_PERMANENT, 8219 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8220 NULL, 0, NULL, 0, 8221 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8222 8223 sysctl_createv(clog, 0, NULL, NULL, 8224 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8225 CTLTYPE_INT, "debug", NULL, 8226 NULL, 0, &key_debug_level, 0, 8227 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8228 sysctl_createv(clog, 0, NULL, NULL, 8229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8230 CTLTYPE_INT, "spi_try", NULL, 8231 NULL, 0, &key_spi_trycnt, 0, 8232 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8233 sysctl_createv(clog, 0, NULL, NULL, 8234 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8235 CTLTYPE_INT, "spi_min_value", NULL, 8236 NULL, 0, &key_spi_minval, 0, 8237 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8238 sysctl_createv(clog, 0, NULL, NULL, 8239 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8240 CTLTYPE_INT, "spi_max_value", NULL, 8241 NULL, 0, &key_spi_maxval, 0, 8242 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8243 sysctl_createv(clog, 0, NULL, NULL, 8244 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8245 CTLTYPE_INT, "random_int", NULL, 8246 NULL, 0, &key_int_random, 0, 8247 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8248 sysctl_createv(clog, 0, NULL, NULL, 8249 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8250 CTLTYPE_INT, "larval_lifetime", NULL, 8251 NULL, 0, &key_larval_lifetime, 0, 8252 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8253 sysctl_createv(clog, 0, NULL, NULL, 8254 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8255 CTLTYPE_INT, "blockacq_count", NULL, 8256 NULL, 0, &key_blockacq_count, 0, 8257 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8258 sysctl_createv(clog, 0, NULL, NULL, 8259 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8260 CTLTYPE_INT, "blockacq_lifetime", NULL, 8261 NULL, 0, &key_blockacq_lifetime, 0, 8262 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8263 sysctl_createv(clog, 0, NULL, NULL, 8264 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8265 CTLTYPE_INT, "esp_keymin", NULL, 8266 NULL, 0, &ipsec_esp_keymin, 0, 8267 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8268 sysctl_createv(clog, 0, NULL, NULL, 8269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8270 CTLTYPE_INT, "prefered_oldsa", NULL, 8271 NULL, 0, &key_prefered_oldsa, 0, 8272 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8273 sysctl_createv(clog, 0, NULL, NULL, 8274 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8275 CTLTYPE_INT, "esp_auth", NULL, 8276 NULL, 0, &ipsec_esp_auth, 0, 8277 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8278 sysctl_createv(clog, 0, NULL, NULL, 8279 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8280 CTLTYPE_INT, "ah_keymin", NULL, 8281 NULL, 0, &ipsec_ah_keymin, 0, 8282 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8283 sysctl_createv(clog, 0, NULL, NULL, 8284 CTLFLAG_PERMANENT, 8285 CTLTYPE_STRUCT, "stats", 8286 SYSCTL_DESCR("PF_KEY statistics"), 8287 sysctl_net_key_stats, 0, NULL, 0, 8288 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8289 } 8290 8291 /* 8292 * Register sysctl names used by setkey(8). For historical reasons, 8293 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8294 * for both IPSEC and KAME IPSEC. 8295 */ 8296 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC") 8297 { 8298 8299 /* Make sure net.key exists before we register nodes underneath it. */ 8300 sysctl_createv(clog, 0, NULL, NULL, 8301 CTLFLAG_PERMANENT, 8302 CTLTYPE_NODE, "net", NULL, 8303 NULL, 0, NULL, 0, 8304 CTL_NET, CTL_EOL); 8305 sysctl_createv(clog, 0, NULL, NULL, 8306 CTLFLAG_PERMANENT, 8307 CTLTYPE_NODE, "key", NULL, 8308 NULL, 0, NULL, 0, 8309 CTL_NET, PF_KEY, CTL_EOL); 8310 8311 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8312 sysctl_createv(clog, 0, NULL, NULL, 8313 CTLFLAG_PERMANENT, 8314 CTLTYPE_STRUCT, "dumpsa", NULL, 8315 sysctl_net_key_dumpsa, 0, NULL, 0, 8316 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8317 sysctl_createv(clog, 0, NULL, NULL, 8318 CTLFLAG_PERMANENT, 8319 CTLTYPE_STRUCT, "dumpsp", NULL, 8320 sysctl_net_key_dumpsp, 0, NULL, 0, 8321 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8322 } 8323
Indexes created Mon Sep 22 10:09:38 GMT 2025